Posted: 14/06/2015 at 17:28
Have you got somewhere else you could put them. If you wait till they've all gone to bed in the evening you can put a piece of tape over the hole and relocate them. I have 2 nest boxes full that were relocated to my garden from somewhere else. Good pest control companies will do this for you if you don't like the idea of doing it yourself.
I expect they're tree bumble bees but if they're honeybees a beekeeper will do it