Agency pay question

Croatoan

As an Agency worker I work for a large company that uses my agency for ad hoc shifts at different sites. On all but one of the sites if I work a 12 hour shift, I get paid for 12 hours as the company policy is that their employees have a one hour paid break per 12 hour shift. The large company is not a Franchise where managers of different sites have autonomy to make their own rules.
On one site however I get paid only 11 hours as the manager there has decided that agency staff will not get paid for breaks which I am forced to take even though during that hour I can't leave the unit, or sleep if I'm on nights. I know there have been or are due to be changes to the way agency workers are treated, but is it OK for companies not to pay agency staff for breaks when they do pay the regular staff working alongside me? (And when the same company does pay me on every other site?)
thanks

scooby088

Have you been there for 13 weeks or more, if so you will be entitled to the same conditions as your none agency colleagues.

Croatoan

I've been going on and off for a couple of years (it'll be one or two shifts a month on average).