[Margaret Pilkington]

If I remember rightly, the sheep is not stunned before slaughter, it has a prayer said into its ear and then the throat is cut with a very sharp knife......and then the blood is drained out......and that is it(unless of course anyone else knows any different).
I can't imagine it will taste very much different, it being halal means that it is acceptable to a bigger buying public.......though I am not sure that many muslims buy their meat in Asda.