i worked in Top Shop for two weeks... terrible terrible company when i worked there.
It was the one in Brent Cross, London.
I was about 17 at the time i think (i'm now 21).
I was there for two weeks and got the job as the Summer sale was starting.
I was on just over minimum wage and the managers avoided takin our bank details to pay us. Changing room was a living nightmare and it was just crap....
But i think it depends on what store you work in and what time of year it is.