DONT GET ME STARTED ON FLIGHT SCHOOLS THAT MAKE YOU WEAR A FREAKING UNIFORM!!!!!!!!!!!!
How pretentious can you get?
FWIW, I was in talks with EFT (Florida) and I asked about this. They said that they don't require it, but strongly encourage it.
That being said, I would never go for my £637 test with the CAA chappy without white shirt/black trousers/black tie. But as for wearing uniform whilst you're training.... GRRRRRRRRRRRRR!!!!!!!!!!!!!!!!!