Keeping the clocks on BST would save ~ 120 lives each year according to ROSPA as more accidents happen in the evening than the morning.
Energy consupmtion would reduces due to more light in evening (not balanced by more light in morning during GMT)
Burden on NHS reduced as more people are inclined to exercise due to lighter evenings.
There was supposed to be a debate in parlaiment on this subject about a year ago, but it got blocked by 2 tory MPs. The proposal was for GMT+1 in winter and GMT+2 in summer, which is going a bit far IMHO.
I really do hate the clocks going back. Staying on British Summer time would cost nothing and improve quality of life for the majority.