Seems like getting bigger and stronger is your life right now! So try and get a little more out of your diet for minimum cost or effort. Just focusing on supplements, and remembering that you're still a student:
A good multi-vit/mineral like Centrum costs about 5p a tablet.
An 11lb tub of MYProtein Whey costs 40 quid and will last nearly 3 months if you take 60g a day, supplying 50g of high quality protein. (50p a day)
Creatine Ethel Esther Powder - 500g bag cost 13 quid and you take 3g a day - 5 months worth! (under 8p a day!)
SO, every day, buy 2 pint bottle of skim or 1% milk, drink a bit, top it up with 60g of whey and add 3g of creatine and shake it up. If you're working out it's your post workout, and if not, just sip it between meals. It's convenient and cheap and supplies: 37g of protein + 50g with the whey and 50 of fast carbs from the milk sugars.
I'd say your at a level now where you owe it to yourself to start doing that.
could you give me links to these products bro? My mum buys all my food but she wont buy supps, except fish oil because she takes them too. But Im about to get a paper round so those supps do sound affordable...