England is a country that wouldn't really suffer that badly (relatively) from global warming. About the worst that would really happen is what happened this summer, and once people get used to the idea that you really don't go down to the banks of a swollen river in full flood and stand in it, the death toll will be well below the number of pensioners and drunk young men who used to freeze to death in cold snaps.
That's as long as the Gulf Stream keeps flowing of course - a couple of years back there were all the scare stories about how it would shut down and the UK would have a mini-ice age.
Turns it there's no clear evidence that the Gulf Stream is weakening. The apparent observed weakening reported in 2005 was due to short-term variability and not the result of global warming.