Hey, I'm studying in the UK too, at Cardiff Uni.
It's really hard to save at uni in my opinion. I managed to have a part time job during my first and second years at uni, but the money I saved from this went towards buying a car, which was necessary for my course. And due to the nature of my course from the 3rd year onwards, its now impossible to get a part time job.
Also, money I saved went on rent and stuff too, because in my opinion the student loans aren't enough to cover basic living costs.
I'm currently looking for a summer job to save for a trip to WDW, but it's quite tricky to find something that temporary. Anyhow, enough of me moaning now lol...
Good luck with your saving!!