The Guardian newspaper has just released it’s league tables and they might be of interest to you.
Kings College, Warwick and Southampton appear to be the leading institutions for media studies courses.
Be warned though, this table is not definitive and is missing lots of available subjects such as journalism and advertising. Also, be careful to check the course content – it appears that employers prefer courses which are more practical than theoretical. Also, it seems that the more chance you are given to work in industry the better your job prospects.