In these circumstances it is best to speak to your union (or an advice agency if you are not a union member) as they will be able to advise on your specific situation. The Agency Workers Regulations include provisions which seek to prevent hirers and agencies from hiring you on a succession of assignments, or from rotating you within an organisation, in order to prevent you from qualifying for equal treatment rights.
The anti avoidance provisions apply if:
Where an Employment Tribunal decides that a hirer or agency has breached these anti-avoidance provisions, they can award you up to £5,000.
It is a good idea to keep detailed records of your assignments, including who you worked for and for how long and any breaks you had from work, including for holiday, sickness or where the employer did not require you. This information may assist in assessing whether the anti-avoidance measures apply.