Bunnies and fireworks DO NOT MIX. I'm not trying to be forceful or use a nasty tone here. Bunnies, because they are prey animals, are already on high alert, but the loud, sudden noises can cause heart attacks, gut stasis; just in general bad times.
Put them in the garage and turn up the tunes if you're not going to have them indoors. Yes, indoors is preferable; but not everyone feels the same way about this and I am not here to start an argument.
Yes, fireworks season is nigh in ol' Blighty. Keep you buns safe.