I wouldn't base anything on the uni league tables. Bizarrely enough most of the jobs I applied to, one of the interviewers always seemed to have gone to the same Uni.
After my first year no one even asked where I got my degree just what it was in and what grade, even later on they just asked whether I have a degree and haven't been asked my grade for the past 5 years. I'm running on 11 years in the industry now.
The college, unless it can openly give you contacts really doesn't come into it, not one of the interviewers even hinted that the similar background gave me any advantage.
I would stay where you are if you're happy there and can get a good grade.
There's a great small company based in Bristol that will give you a world of experience in the industry. Might be worth approaching them now to see if you can get holiday work etc. (Stirling Dynamics)