Mike Barton
LE

Careful with bats, if I am not wrong in the UK some are protected species, if you have them in your attic you need to call in professionals, you just can't fumigate the buggers.I assume this would also theoretically work on bats?
Like I say, I could be wrong and others more knowledgeable can give better advice but that is what I was told about 20 years ago when I had some in the place.