Hello Chris,
A few things you should be clear on if you do decide to make the trip to Bicester Village - even though stuff is discounted, its still not incredibly cheap. If you want basic sweaters, shirts and polo's from Ralph Lauren, Tommy Hilfiger, Fred Perry, etc, then its a good idea to visit as they are quite cheap. But if you want e.g. a suit or a jacket, you're still going to pay quite some - so remember to take enough money with you. I don't really know how it is for men, but when I went to other shops such as Diane Von Furstenberg, Temperley etc, there really wasn't much to buy - I wasn't impressed. Also a lot of the stuff is a bit outdated, so go there for wardrope staples. They have good mens shoe shops as well, and I think you could find quite a bargain. Go there on a sunny day with low expectations, and visit the RL shop last so you don't have to carry all the stuff around!