The Halton list is way out dated!
Loads of useless stuff on there, or just things that take ages to find at home that can be bought at the NAAFI. Like the white socks, it says 7 or something, but you are issued socks for PT, so just bring like 4 pairs for wearing in the block. Dont take too many clothes, just a couple of decent sets for wearing out at night and the rest as just shorts and t-shirts for hanging around in.