So exciting - just found I have a nest of bumblebees in the bottom of my plastic composter. It's one of those with a slide up lid at the bottom and I've seen a bee flying in and out before but didn't realise I had a nest until I took the lid off today and heard this busy buzzing going on under all the rubbish. Seems my efforts to make the garden insect and bird friendly are being rewarded

I know nothing about them. Will they just fly off eventually? Should I leave this composter alone until it goes quiet (I have others)? Any advice appreciated.