Your rights as an agency worker
Pay
You’re entitled to the National Minimum Wage for all the hours you work, even if you have not recorded them on a timesheet.
After 12 weeks you’re entitled to be paid the same as a permanent employee doing the same job.
If your agency withholds your pay
Your agency can delay paying you while they get proof of the hours you worked, but only for a reasonable period of time.
Your agency cannot refuse to pay you because your hirer’s unhappy with your work - this is a contractual issue between your agency and the hirer.
You can make a claim to an employment tribunal if your agency is refusing to pay you.
If you’ve opted out of the right to equal pay
Your agency should contact you to explain that after 12 weeks you’re entitled to the same pay as a permanent employee doing the same job.