Hiring temporary workers can give a business valuable flexibility. When demand increases, permanent employees are unavailable, or a project requires additional capacity, agency workers can help an organisation respond without immediately committing to permanent recruitment. But flexibility does not mean freedom from employment law. For UK employers that use temporary or agency workers, understanding the legal responsibilities attached to those workers is an essential part of managing workforce risk.
One of the most important pieces of legislation employers need to understand is the Agency Workers Regulations 2010 (AWR). The regulations apply to agency workers supplied by temporary work agencies to work temporarily under the supervision and direction of a hirer. They establish certain rights from the first day of an assignment and additional equal-treatment rights after an agency worker has completed a 12-week qualifying period in the same role with the same hirer.
The important point for employers is that bringing in a worker through an agency does not remove the hirer's responsibilities. The agency and the hirer have different obligations, and some responsibilities sit directly with the organisation where the worker is carrying out the assignment.
The 12-Week Rule Employers Need to Track
The 12-week qualifying period is one of the most important aspects of the Agency Workers Regulations. Once an agency worker has completed 12 weeks in the same job with the same hirer, they become entitled to the same basic working and employment conditions as if they had been recruited directly.
These conditions can include pay, working time, night work, rest periods, rest breaks and annual leave. The worker does not necessarily have to work 12 consecutive calendar weeks without interruption for the qualifying period to apply; certain types of absence and breaks can affect how the period is calculated.
For an employer, this means that temporary staffing should not be managed as though every new assignment automatically resets the clock. An agency worker can accumulate qualifying weeks, and previous assignments may need to be taken into account when determining whether the 12-week threshold has been reached. The government guidance specifically warns that the qualifying period can continue to accrue even where a worker has been supplied through more than one agency.
This makes accurate workforce records important. If an organisation has several sites, multiple agencies or a large temporary workforce, simply assuming that the agency is tracking everything may create avoidable compliance risk.
Day-One Rights Also Matter
The 12-week rule does not mean agency workers have no rights before completing 12 weeks.
From the first day of an assignment, agency workers are entitled to access relevant collective facilities and services provided by the hirer, such as canteens, childcare facilities or transport services, subject to the legal requirements. They must also be given information about relevant job vacancies within the hirer so that they have the same opportunity to apply for permanent positions as comparable employees.
For employers, these are relatively straightforward obligations, but they can easily be overlooked if temporary workers are treated as separate from the wider workforce.
A business may have a staff intranet, internal noticeboard or recruitment portal that permanent employees routinely use. If agency workers are excluded from information about relevant vacancies simply because they are temporary, the organisation may not be meeting its obligations.
The same applies to shared facilities. Calling someone an "agency worker" does not automatically justify excluding them from facilities available to comparable workers.
The Employer Still Has Health and Safety Responsibilities
There is another important misconception: using an agency does not transfer responsibility for workplace health and safety away from the hirer.
GOV.UK makes clear that employers using agency staff remain responsible for their health and safety while they are working for the organisation.
This is particularly important when temporary workers are introduced into unfamiliar environments. A worker may have previous experience in the industry but still need workplace-specific information about risks, procedures, equipment and emergency arrangements.
The employer knows the environment. The employer controls the workplace. The employer therefore needs to ensure that temporary workers receive the information and instruction appropriate to the work they are expected to perform.
The Information You Give Your Agency Matters
One of the less visible compliance responsibilities of a hirer is providing accurate information to the agency.
If an organisation changes its pay rates, working conditions or other basic employment terms, the agency needs accurate and up-to-date information so that the agency worker receives the treatment to which they are entitled.
The government's AWR guidance specifically advises hirers to provide agencies with up-to-date information about their terms and conditions. It also explains that where a hirer fails to provide accurate information and an agency worker consequently does not receive the correct treatment, liability can rest with the hirer to the extent that the hirer is responsible for the breach.
This is an important distinction.
Sending the worker through an agency does not mean the employer can simply say, "The agency handles that."
If the agency is relying on information supplied by the hirer, the accuracy of that information matters.
A Real Case: When Agency Worker Conditions Become a Legal Issue
The risks are not theoretical.
In Kocur v Angard Staffing Solutions Ltd and Royal Mail Group Ltd, agency workers supplied to Royal Mail challenged their treatment under the Agency Workers Regulations. The case eventually reached the Employment Appeal Tribunal.
The workers argued that they were receiving fewer annual leave days and shorter paid rest breaks than comparable employees. The Employment Tribunal had initially found that the differences were not cured by the workers receiving a higher hourly rate. The Employment Appeal Tribunal agreed that the approach was wrong in law and confirmed that the AWR required comparison of the relevant basic working and employment conditions.
The figures make the issue particularly clear. The agency worker in question was receiving 28 days' annual leave and 30 minutes of paid rest breaks, while comparable employees received 30.5 days' annual leave and one-hour paid rest breaks. The tribunal's decision therefore demonstrated that an employer cannot simply assume that a higher hourly rate compensates for every difference in basic employment conditions.
The case is a useful reminder for employers: equal treatment is about more than looking at the headline hourly rate.
The case involved multiple parties and complex legal questions, so it should not be interpreted as saying that every difference between an agency worker and a permanent employee automatically creates liability. The important lesson is that employers need to understand what the AWR requires and provide accurate information to the agency.
The Cost of Getting Pay Wrong Can Be Significant
The National Minimum Wage provides another major area of risk.
Employers are legally required to pay eligible workers at least the applicable National Minimum Wage or National Living Wage. Where HMRC identifies underpayment, workers can be entitled to arrears, while enforcement action can also result in financial penalties.
Under the current enforcement framework, the maximum National Minimum Wage penalty is 200% of the total underpayment, subject to a maximum of £20,000 per worker. The government can also publicly name employers that breach minimum-wage legislation.
The scale of enforcement illustrates why this should not be dismissed as a minor payroll issue.
During the 2023–24 financial year, 524 employers were named for £15.8 million in arrears affecting 172,000 workers. By the May 2025 naming round, around 3,700 employers had been named, and more than £49 million in arrears had been repaid to more than 520,000 workers. Enforcement is also set to intensify further: the Fair Work Agency began operating in 2026 as the new state regulator for employment businesses and agencies, with powers covering minimum wage, agency standards and licensing conditions.
For an employer using temporary workers, a small payroll error repeated across dozens or hundreds of workers can quickly become a much larger liability.
The Agency Does Not Remove the Need for Employer Oversight
The relationship between a hirer and an agency should therefore be based on more than sending a vacancy and receiving a worker.
Employers should know which workers are on assignment, which roles they are performing, when assignments started, what rates and conditions apply, and whether workers are approaching or have completed the 12-week qualifying period.
They should also communicate changes to pay, working conditions and job requirements to the agency promptly.
This is not about creating unnecessary administration.
It is about creating a clear information chain between the organisation that needs the worker, the agency supplying the worker and the person carrying out the assignment.
When that chain breaks, compliance problems can follow.
Temporary Does Not Mean Exempt
A common mistake is to think of temporary workers as somehow outside the normal employment framework.
They are not.
Agency workers have statutory protections, including rights under the Agency Workers Regulations, National Minimum Wage legislation, Working Time Regulations and other employment laws depending on their circumstances.
The fact that someone is working for three days rather than three years does not make employment law irrelevant.
In fact, the temporary nature of the relationship can make good communication even more important because workers may be unfamiliar with the organisation's systems, policies and expectations.
What Should Employers Do?
The starting point is not complicated.
Know which workers you have on assignment. Know which agency supplied them. Know what role they are performing. Keep track of how long they have been working in that role. Give your agency accurate information about the pay and employment conditions applicable to comparable direct workers. Make sure temporary workers receive appropriate workplace information, health and safety arrangements and access to facilities and vacancy information where required.
Most importantly, do not assume that the agency relationship eliminates the need for the hirer to understand its own obligations.
A good staffing arrangement should make compliance easier, not create another blind spot.
Where MEET Resources Comes In
At MEET Resources Limited, we understand that temporary staffing is not simply about putting a person into an empty shift.
For employers, the objective is to access workforce flexibility while maintaining appropriate standards around recruitment, documentation, communication and compliance.
That requires a staffing relationship where information flows properly between the employer, agency, and worker.
The employer knows what it needs. The agency understands the assignment. The worker understands what is expected.
When those three elements are aligned, temporary staffing can become a practical workforce solution rather than an additional compliance risk.
The Employer's Responsibility Starts Before the Worker Arrives
The safest approach to temporary staffing is not to wait for a worker complaint, payroll problem or tribunal claim before reviewing your processes.
Start earlier. Understand the regulations. Provide accurate information. Track assignments. Review employment conditions. Communicate changes. And work with a staffing partner that understands that compliance is part of the service—not an afterthought.
Temporary workers give businesses flexibility.
But flexibility works best when it is supported by clarity, accurate information and responsible workforce management.
Because when an organisation hires temporary staff, it is not simply filling a vacancy.
It is taking on responsibilities that need to be managed properly.
MEET Resources Limited — connecting businesses with the people they need, responsibly.
References
- Acas (2026) — Working through an agency
- GOV.UK (2026a) — Agency Workers Regulations 2010: Guidance for Recruiters
- GOV.UK (2026b) — Agency staff: contracts and employer responsibilities
- GOV.UK (2026c) — Your rights as an agency worker: Equal treatment
- GOV.UK (2026d) — Fair Work Agency: enforcement policy statement
- GOV.UK (2025) — National Living Wage and National Minimum Wage: government evidence on enforcement and compliance
- Kocur v Angard Staffing Solutions Ltd & Royal Mail Group Ltd [2018] UKEAT/0181/17/BA, Employment Appeal Tribunal
This article is intended for general information and educational/SEO purposes and does not constitute legal advice. Employers should obtain appropriate professional advice on their specific workforce arrangements and legal obligations.