I'm in the same situation, but with RVC and Bristol! Some things I've thought about with London are:
-I love how its only vet students - e.g. The veterinary specific library
-Three years on the out of town campus - implies a lot of hands on experience?
-Very expensive!!
-Would be fun/exciting living in London
-Can work in the US with a BVetMed degree
(-Also I fell in love with London when I went to visit it!)
However, I've read some unpleasant things on some older threads - such as public transport around Hawkshead is awful but you're not allowed a car, stories of crime (stabbing in Camden, rape in Hawkshead?!?), that friends can go a bit too crazy around exam time, and the social life isn't all it's cracked up to be. If anyone could give any information about whether or not there is truth behind some of these bad points, it would be much appreciated!!