Welcome!
I'm at university as well, and it is hard.
I think the fridge idea is a good one, and I use my fridge to serve all sorts of healthy stuff like low fat yogurt, fruits, and veggies. But there are many good snacks that don't need a fridge. Some of my favorites are snack size natural applesauce (the stuff that is just apples and water), high fiber low calorie cereal, and high fiber and protein, low cal granola bars. Do they sell kashi products in England? If they do I certainly recommend them. They have tons of granola bars, cereals, and protein bars, all of which are high in fiber and protein while low in fat and calories. Plus they are delicious!! They do cost a bit more though...
Also if you have a meal plan (my college requires it for some students
) You can usually steal fresh fruit and veggies from them and save a bit of money.
To get active, I have found that the easiest way is walking around campus, or taking the long way to my classes. I bought a pedometer a few weeks ago and it has really helped me since I can track the number of steps I take each day, plus it was only $10 and so it didn't break the bank.
I also think you have a good idea about the job. I recently had a similar idea and now I am babysitting three times a week, and I know that I am burning calories running after them
Anyway, losing weight at Uni is hard, but don't get discouraged if slip up occasionally. I personally know that I had a bad week last week (two friend's birthday dinners, no extra walking, and not enough water) and I don't really want to get on the scale tomorrow, but the most important thing is that I am going to keep going, no matter what number I am met with.
Good luck!! We're here for you