Most overseas students find our 'campus' Unis easier to cope with than the more 'traditional' ones that tend to be strung out across big cities. The campus Unis tend to be smaller and have a more comfortable, supportive, 'village' feel with a much more community atmosphere.
Look at Universities like Sussex, Kent, UEA, York - they are all modern campus Unis in medium size historic towns/cities that will give you a real sense of 'English life'. The first three are within easy reach of London for days out etc. Warwick is similar and good for 'business' type subjects, though its on a green-field site not connected to Warwick itself.