Total 175 job vacancies by Hays Specialist Recruitment

Location: Colchester
Salary: Competitive
Industry: Water UtilitiesAre you an experienced Project Engineer looking for an exciting new opportunity in the water utilities sector? We are currently seeking a dedicated professional to join a leading water utilities company based in Colchester. This is a permanent role that offers a competitive salary and a comprehensive benefits package.
Key Responsibilities:

• Manage and oversee water utility projects from inception to completion.
• You will be enabling projects to be delivered to time, cost, specification, client needs and the needs and regulations of other stakeholders.
• You will support the capture of asset changes (decommissioning, alteration, creation) in the relevant corporate systems.
• Utilise your expertise in MEICA and operational water settings to drive project success.
• Implement best practices in project management to deliver on time and within budget

Requirements:

• Appropriate professional engineering qualifications.
• Proven experience in project management within the water utilities sector.
• Strong knowledge and experience with MEICA.
• Previous operational water setting experience.
• Excellent communication and leadership skills.

Benefits:

• Annual leave: 33 days per year
• Company Car or Fuel Allowance
• Fuel Card: For work-related travel.
• Life Insurance: For peace of mind.

If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new company
You will be working for an Essex-based specialist steelwork contractor with a vast project portfolio ranging from singular steel beam supply to multimillion pound steel projects.
Your new role
As the senior designer, you will be working on a variety of project sizes, from small staircases to large industrial builds. Your responsibilities will include:

• Leading the design team and allocating the works appropriately.
• Ensure compliance of designs with building regulations and design intents.
• Work closely with clients and project management team
• Site surveys
• Ensure works are correct and uploaded to relevant project files
• Management of client platforms
• Liaise with project engineers and architects.
• Ensuring full compliance from the drawing office with regard to UK-CA ES BN 1090 and ISO 9001.

What you'll need to succeed

• Specific experience in the steel industry as an advanced steel/tekla draughtsman
• Experience in developing GA's & details for steelwork and metal work from Architect/Engineers drawings and site measurements, and subsequent fabrication drawings.

What you'll get in return
The opportunity to work for a friendly family-run business that prioritises staff wellbeing and internal promotion.
What you need to do now


If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call Tiffany now on 01473261900.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new role
Southend's Commissioning Directorate are looking to appoint a full-time Quality Improvement Officer in a fixed term capacity until November 2026.

Within this position, hybrid working opportunities are available. However, you are required to be on-site at the Civic Centre a minimum of 1 day a week.
You are required to be a car driver and have use of a car for this position.

The main purpose of the Quality and Improvement position is to improve the quality of care and support experienced by residents of Southend. A key part of the role is to inspect, monitor, develop and implement quality improvement plans that enable providers to improve services. This requires the successful candidate to carry out the statutory duty five, under the Care Act 2014 which requires the council to have a diverse and quality social care provision in their area.
Working closely with service providers, as well as users of the service and their friends and families, the roles will focus on the co-evaluation of services to ensure users' views and suggestions for improvement are implemented.

Key responsibilities:* You will inspect services and record the results of the inspections* You will ensure inspections include people who use services and their families and friends.* You will assess and reconcile quality information to identify opportunities for improvement.* You will contribute to the collective team working at all levels in the council and the wider health and care system.* You will ensure PAMMS and other quality systems are used effectively.* You will have responsibility for an area of organisational safeguarding

What you'll need to succeed
To be successful in this position, you will need to have experience in managing a social care service, as well as administration, team work and good communication experience.

You need to have experience/knowledge of CQC and Ofsted regulations and have experience in developing and monitoring service improvement plans for care and support settings.

You will need to be able to function under pressure, managing a caseload which involves meeting good outcomes for people in receipt of services.

The successful candidate must have strong written and verbal communication skills, excellent interpersonal and engagement skills and knowledge of current health and social care policy and legislation.

What you'll get in return
When joining the council, you can enjoy a range of benefits including: 25 days annual leave, flexible working and excellent training and development opportunities. They are committed to ensuring that you are supported in this varied and challenging role with the appropriate level of training.
What you need to do now
If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new company
Our client is a leading Tier 1 construction contractor known for delivering high-quality projects across various sectors, including commercial, residential, and infrastructure. We pride ourselves on our commitment to excellence, innovation, and sustainability.
Your new role
They are seeking an experienced and dynamic Bid Manager to join our team. The successful candidate will be responsible for managing the bid process from start to finish, ensuring that all bids are competitive, compliant, and compelling. This role requires a strategic thinker with excellent communication skills and a deep understanding of the construction industry.Key Responsibilities:

• Lead and manage the bid process for major construction projects.
• Develop and implement bid strategies to secure new business.
• Coordinate with internal teams and external partners to gather necessary information for bid submissions.
• Review and analyse bid documents, ensuring compliance with client requirements.
• Prepare and present bid proposals to clients and stakeholders.
• Monitor and report on bid progress and outcomes.
• Maintain up-to-date knowledge of industry trends and competitive activities.

What you'll need to succeed

• Proven experience as a Bid Manager in the construction industry, preferably with a Tier 1 contractor.
• Strong understanding of construction processes, contracts, and regulations.
• Excellent project management and organisational skills.
• Exceptional written and verbal communication skills.
• The ability to work under pressure and meet tight deadlines.
• Proficiency in bid management software and Microsoft Office Suite.

What you'll get in return

• Competitive salary and benefits package.
• Opportunities for professional development and career advancement.
• A supportive and collaborative work environment.
• The chance to work on high-profile and challenging projects.

What you need to do now
If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call Tiffany Vanderloo now on 01473 261900.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new company
You will be working for a national tier 1 contractor that has a strong pipeline of projects across a variety of sectors. They prioritise a relationship based business strategy which ensures a strong future workload based on preferred bidder contracts and repeat business.
Your new role
As the commercial lead within your specific geographical region, you will be responsible for leading your team and managing your designated projects from stage 2. Working closely to the contracts commercial targets you will advise the management team, producing accurate and timely commercial reports.
What you'll need to succeed
You will have previously worked as a senior quantity surveyor and have experience managing a team, ideally on projects above £10 million. You will hold a B.Sc. in quantity surveying (or similar field) and be working towards a professional membership.
What you'll get in return
Not only will you receive a competitive package, but our client is a company that prioritises employee wellbeing and worklife balance. Additional benefits include:

• 26 days holiday plus bank holidays, which rises with length of service
• Private healthcare
• Life assurance
• Mental wellbeing support
• Retail discounts
• Long service awards

What you need to do now


If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call Tiffany Vanderloo now on 01473 261900.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new company
Hays Accountancy & Finance are delighted to be partnering with one of Essex's growing Accountancy teams in a boutique business who specialise in corporate finance, personal tax, legal, medical, business strategy and support, and business recovery in their search for two Accounts Assistants with hourly rates ranging from £13 - £15 p/h, depending on experience.

Your new role
You will be responsible for working with a variety of businesses in the preparation of bookkeeping across all the ledgers to trial balance through to submission of VAT returns and the production of management accounts to be reviewed by a senior accountant of the company.

What you'll need to succeed
Candidates must be detail oriented with high numeracy and analytical skills. Previous experience within Accounts Support is essential and applicants must be at AAT level 3 or higher.

What you'll get in return
The hourly rate is at £13 - £15 p/h - there is free parking on site and flexible/hybrid working options.
(Part-time working also considered)

What you need to do now
If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Electrical engineerLocation
Colchester Witham BraintreeAs part of our growing engineering family, we are looking for an experienced
Electrician to join us as a Mobile Electrical Engineer.


You will be upgrading, installing systems and carrying out maintenance work, inspections and fault-finding in commercial environment.You will keep the clients updated with any developments, recording all activities, remedial work, inspection logs and ensure a high level of customer service and will need good verbal and written communication and comfortable working with IT to record your tasks and updates.requirementsMinimum 5 years of experience in commercial or industrial environment, as an electrical engineer or multi-skilled engineer.Level 3 City and Guilds 2330 or NVQ Level 3 Electrical Installation
18th edition.C&G 2391 is desirable.The ideal candidate would have a background in facilities management, mobile maintenance or construction with project work within a region.If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or contact me here, aleksandra.otlewska@hays.com
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays Talent Solutions is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

A well-established firm of chartered accountants and business advisors is seeking an Insolvency & Recovery Administrator to join their team. The firm offers a wide range of services, including auditing, accounting, tax, and corporate finance, serving a diverse client base across the UK and internationally.

Key Responsibilities:

• Undertake smaller cases, raising queries with clients or managers.
• Document understanding of clients' businesses, risks, systems, and controls.
• Draft routine statutory documents.
• Clear simple queries with clients and adjust pre-appointment documents.
• Conduct moderately complex reports and investigations.
• Assist on larger, more complex cases, completing allocated sections thoroughly.

To be successful

• Experience in an insolvency role and bookkeeping/accounts experience with familiarity in accounting to trial balance.
• The ability to work independently and as part of a team.
• Excellent communication and interpersonal skills, and good IT skills (Microsoft Excel, Word, Outlook).

In reward

• Hybrid and Flexible working
• Supportive culture which promotes progression and growth.
• Study Support
• 23 days (if studying) / 25 days, with the option to buy/sell up to 5 days.
• Contributory pension scheme
• 4x life assurance
• All-employee share scheme

Please apply online or contact Cara Whyte at Hays to discuss further

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new role
Southend Council are looking to-appoint X2 full-time, contract experienced officers in a fixed-term capacity until November 2026.Within this position, hybrid working opportunities are available. However, you are required to be onsite at the Civic Centre a minimum of 2 days a week.

You are required to ensure effective commercial management of public health, social care contracts and grants.
There will be a need to ensure contracts are effectively managed, ensure appropriate monitoring takes place in order to deliver the correct outcomes of deliverables, and social values. You are required to deliver commercial negotiation to maximise the use of public funds in the interests of the residents of Southend. Also, making sure that transactional processing takes place, and that suppliers are paid in line with the prompt payment code.

You will assess and reconcile demand and supply data to inform market and supplier development, as well as develop contract monitoring plans with providers and support them to implement those plans. You will use the results of contract monitoring and reporting to generate and share market intelligence. You will contribute to the collective commissioning team working at all levels in the council and the wider health and care system.

What you'll need to succeed
To be successful in this position, you must have previous contract management experience within a social care setting.You are required to have advanced administration skills, with proven
knowledge of processing market data, public health, commissioning and funding.

The successful candidate will need to be able to function under pressure, managing a caseload which involves meeting council financial and statutory objectives, while also taking into account the welfare of people who are in receipt of social care support services.

What you'll get in return
When joining the council, you can enjoy a range of benefits including: 25 days annual leave, flexible working and excellent training and development opportunities. They are committed to ensuring that you are supported in this varied and challenging role with the appropriate level of training.
What you need to do now
If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Location: Near Colchester
Position: Cleaner
Type: Long-Term Temporary (until March)
Hours: 12 hours per week
Pay Rate: £12 - £16 per hour (Holiday entitlement included)

About the Role
We are seeking a dedicated and reliable Cleaner to join our team in a long-term temporary role until March. The ideal candidate will have previous cleaning experience and the ability to drive, as the position requires travel to various locations.

Responsibilities

• Hoovering and mopping communal areas
• Dusting and cleaning the lounge and guest room (when in use)
• Ensuring all areas are kept clean and tidy
• Adhering to health and safety standards

Requirements

• Previous experience in cleaning roles
• Must have a valid driver's license and access to a vehicle
• Attention to detail and a strong work ethic
• Ability to work independently and as part of a team

Benefits

• Competitive pay rate between £12 and £16 per hour
• Holiday entitlement included
• Opportunity for long-term employment

If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new role
Monday- Friday 09:00-17:00
£20,000-£25,000 + Bonus
The Lead Administrator will have full access to all leads within the business to increase client visits, chase up leads and push towards a sale.
This role involves proactively reaching out to potential customers, building and maintaining relationships with the sales team to help successfully close deals.
Main Duties:
* Making outbound calls to the current home lift leads to pushing for show room visits or site visits.
* Working with the sales team to pass leads over which are potential sales.
* Effectively providing potential clients with product information they require.
* Business introduction calls to other businesses' IE architects, builders.
* Provide excellent customer service at all times and in line with company guidelines.
* Maintain accurate and up-to-date records of all the leads.
* Collaborate with the sales team to ensure smooth passing of qualified leads.
* Utilising Linked In to reach out to new clients.


What you'll need to succeed
They require an individual that is motivated and enthusiastic with strong verbal communication skills that thrives on hitting targets in a fast-paced environment.


What you need to do now


If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Job Summary:We are seeking a reliable and skilled handyperson to join our team. The ideal candidate will have a broad range of repair and maintenance skills, a keen eye for detail, and the ability to work independently. This role involves performing various tasks to ensure our facilities are well-maintained and functional.

Key Responsibilities:

• Perform general maintenance and repair tasks in various areas such as plumbing, electrical, carpentry, and painting.
• Inspect and troubleshoot equipment and systems to identify issues.
• Respond to maintenance requests in a timely manner.
• Install and repair doors, windows, drywall, and other fixtures.
• Assemble and install furniture and appliances.
• Ensure compliance with health and safety regulations.
• Maintain records of work performed and materials used.
• Provide excellent customer service and communicate effectively with clients and team members.

Qualifications:

• Proven experience as a handyperson or in a similar role.
• Proficient at using hand and power tools.
• Ability to read technical manuals and drawings.
• Excellent problem-solving skills and attention to detail.
• Good physical condition and strength with the ability to work in various environments.

If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.

If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Key Stage 2 Teacher - Year 5 Essex
Location: Essex, South OckendonContract: Full-time / Temporary (potential to go permanent)Start date: January 2025
Your new schoolAn opportunity has arisen for a Year 5 teacher in a school in Essex, South Ockendon.
Located at the southern end of South Ockendon, the school is set within approximately 8 acres of pleasant grounds. Their part-time Nursery Class welcomes children from the age of 3, with a maximum of 26 places available for both morning and afternoon sessions.

Your role as a Year 5 Teacher

• Teaching from planned objectives, which take account of differentiation to achieve progression in pupil's learning, setting clear targets for pupils' learning based on prior attainment
• Fulfil the School's and National assessment, recording and reporting system as appropriate
• Manage, with support, the work of Learning Support Assistants and other helpers in class to enhance children's learning
• Take part fully in primary school duties such as supervising playtimes, taking whole school assemblies and class assemblies

What you will need to succeed for this Year 5 Teacher roleA successful candidate will:

• Must hold QTS status
• Have recent experience of working in primary schools in the UK
• Have good interpersonal skills
• Show good standards of professionalism, being well organised and capable of working to policy and procedure to agreed timescales

BenefitsHays Education in turn will provide you with the following benefits:

• Access to interviews at some of the most forward-thinking schools in London
• Free Child Protection and Safeguarding Training
• Pension enrolment
• Active support from our expert consultants about job opportunities and competitive pay rates
• Hays 'Refer a Friend scheme' - £350 of high street vouchers for you, every time you recommend a teacher or teaching assistant, who then goes on to work for us.

How to apply for this Year 5 Teacher roleIf you are interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. If this job is not quite right for you but you are looking for a new position, please contact us for a confidential discussion on your career.
INDEDU

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new company
We are seeking a compassionate and experienced Qualified Social Worker's or Family Court Advisor's to join a passionate and supportive team in Chelmsford. The successful candidate will play a crucial role in safeguarding the welfare of children involved in family court proceedings. You will provide expert advice and support to the courts, ensuring that the best interests of the children are always prioritised.
Your new role

• Conducting assessments and preparing reports for the family courts.
• Providing expert advice and recommendations to the courts regarding child welfare.
• Working closely with families, children, and other professionals to gather relevant information.
• Attending court hearings and presenting findings.
• Ensuring all work complies with relevant legislation and guidelines.
• Maintaining accurate and up-to-date records

What you'll need to succeed

• A degree in social work or a related field.
• Registration with Social Work England.
• Significant experience in child protection and family court work.
• Excellent communication and interpersonal skills.
• Strong analytical and report-writing abilities.

What you'll get in return

• Competitive salary.
• Comprehensive training and development opportunities.
• Supportive and collaborative working environment.
• Generous holiday entitlement.
• Pension scheme.
• Can bring continuous service entitlement with you, if over 5 years in current role.

What you need to do now


If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. Alternatively, please send an up to date CV
If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk

Your new organisation
Southend on Sea City Council is a Unitary local authority, providing vital services to meet the needs of the local community. We employ around 1,800 staff who are working alongside our partners and local communities to deliver the city vision and make lives better for the people of Southend.

Working for Southend on Sea City Council offers a challenging and rewarding career in local government within a collaborative and innovate environment, with the benefit of flexible working practices to support a positive worklife balance. As a Unitary Authority, we are responsible for all local government functions ranging from social services, transport, public health and parks through to planning, trading standards, community safety and education, so we offer a wide range of career opportunities. The diversity of our economy and communities and investment in a number of exciting regeneration projects makes our Council a great place to work, learn and make a difference.

Your new role
We are looking for Civil Engineering Technician (x2) to join the Highways & Coastal - Project Delivery team on a full-time and permanent basis. This contract is offered on a hybrid basis which is a combination of attending the office, working from home and regular site visits (as and when required). This post is within the Project Delivery Team (Highways & Coastal) responsible for Highway Design, Traffic Management/Regulations, Road Safety, Structures, Flood Risk and Coastal Protection.

As a civil engineering technician, you will provide a full range of technical support functions that are required for the across teams within Infrastructure & Environment directorate. You will be responsible for supporting the initiation, planning and implementation of highway, traffic, flood risk, coastal protection and road safety projects to our agreed high standards and within budget. You will be required to use AutoCAD and / or equivalent software for the production of drawings as required.

This role will report to Senior Engineers and will be required to support the design, delivery and monitoring of highway and coastal projects delivered in accordance with the Council's strategies and policies, to time and budget.

What you'll need to succeed
To be successful in this role, the ability to use a variety of IT packages to undertake surveys, designs and other technical assessments including AutoCAD, Civils 3D/MX or similar and InfoDrainage is essential. Previous experience of assisting assistant engineers, engineers and senior engineers with the management of resources such as time, financial, contract and project management is essential. Good written and verbal communication skills, including the ability to build and maintain effective internal and external working relationships is crucial for this role. It is essential that you can provide timely and accurate advice to senior leaders/members/local councillors and the public on all highway, flooding and coastal related matters.

Your application will not be considered if you do not have one of the following:

• ONC/BTEC+ in civil engineering / highways / or related discipline.
• Student or Graduate Engineer Membership of (or working towards) a professional body and 2+ years' experience.
• Equivalent knowledge and experience of working within at least one relevant field (Highways Design/Maintenance, Traffic Management, Road Safety or Parking)

What you'll get in return
When joining the council, you can enjoy a range of benefits including: 25 days annual leave, flexible working and excellent training and development opportunities. They are committed to ensuring that you are supported in this varied and challenging role with the appropriate level of training. A full list of benefits provided by Southend Council can be viewed on the "Why Work For Us?" tab.

What you need to do now
If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV.Please note: Applications for this vacancy may close prior to the date advertised above so you are advised to apply as soon as you are able to.
The Council is an equal-opportunities employer. We welcome applications, regardless of race, sex, disability, sexual orientation, gender reassignment, marital or civil partner status, pregnancy or maternity, age or religion or belief.

Hays EA is a trading division of Hays Specialist Recruitment Limited and acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk