Also, you'll be surprised how cheap you can actually live off food (so, 2,000 is either a lot of takeaways/beer or a lot of M&S food, lol). =l
Every few weeks (3-4), I set myself a challange to live off around £10 a week and I actually managed to feed myself on £40 for a whole month at one stage. =D
Yes, this did include healthy meals but be prepared to buy frozen stuff and if you can, buy in bulk. Still got some stuff in the freezer from December, lol.
Healthiest and cheapest things to buy and stick in the freezer(or stick under the sink) to forget about:
Brocolli
Cauliflower
Potatos
Onions
Noodles
Pasta
Peas
Some kind of meat or meat substitute.
Hash browns (A must have)
Beans
Sweetcorn
Onion Rings
Carrots
Rice
Tinned Pineapple
You can buy all this stuff CHEAP and it will sit in your freezer forever (be careful of house mates stealing food though), I spent this year living by myself and am living with 2 (potentially 3) of my mates next year in a house and so, we don't really have any trust issues there. =D
EDIT:
How could I forget chips...
Oh yeah and Aldi/Lidl is a student's best friend, trust me. =P