Reply to Novice Joan
Unlike wasps and honeybees, bumblebees are very docile nesters. For one thing there are far fewer of them in the small untidy nest, probably only a couple of hundred at the height of the season, where wasps may have 10 – 12,000 and honeybees up to 80,000.
They are also far slower to anger. Both wasps and honeybees will attack if you stand too closely to the nest, but bumblebees will just fly round you.
Caution is the guiding principle here. If you and they can go about both your respective businesses without getting in each other's way or causing upset, then leave them alone. If you find they are disturbed by your continued presence and they start becoming aggressive then you may have to get rid of them.
I have a nest in one of my compost bins this year. It is just 3 metres from the back door, and although we keep plonking in grass cuttings and kitchen waste, they keep coming and going apparently oblivious of our actions. And although I've mentioned it to my family, no-one else has yet noticed their activity.