Hi Buildersmate !
Bees and insects are the pollinators of our world and we depend on them for our survival. If you have a garden with plenty of Plants, Flowers and Fruit Trees for them to visit, then you are being a good Host for them to survive and flourish. The more we encourage nature and appreciate what nature does for us, then our world will survive.
Beekeepers are having big problems Worlwide at present as they are losing a lot of stock and Honey Production is suffering. Pesticides are being blamed for the demise of the Honey Bee and the less Gardeners and Farmers use the better for the benefit of all.
If you leave the Bumble Bee nest alone they will not bother you. I would be more concerned if it was a Wasp's nest as that would cause you problems.
Our World needs preserving and we as Humans have a role to play in making sure Nature survives.
Happy Bumbling !!!!!!!