you have to pay a premium for the good location........whatever the better location is useful for you or not. (which depends on if you wanna try to find a job in UK)
Warwick is quite a .......hard to decide. i will say it defintly >>>> edinburgh, manchester by 不能量度的距離 for the finance side in UK. so the choice is definitly depends on one's career goal.
很想留UK (or if you are from HK), 打算academic的話, warwick for sure.
要不就really depends.