I would imagine that the increased intolerance is largely a perception or an undercurrent. However that's more in areas of Sussex that i am familiar with. I wouldn't like to comment about areas with huge Muslim populations though. And I agree, tolerance levels are subjective. I think the English...
In regard to the 15% who think those depicting Mohammed should be attacked and 93% figure for those who think they should obey British law, I do not find it comforting as presumably the percentage who think it's okay for the attacks but who want to obey the law, will remain quiet if they are...