The Bumblebee Conservation Trust's website has a lot of information about bumblebees and their nests.
Beekeepers are normally only able to assist with accessible honey bee swarms.
www.bumblebeeconservation.org/learn-about-...
bumblebeeconservation.org
Bumblebee nests - Bumblebee Conservation Trust
Learn more about bumblebee nests and what they look like, and find out what you should do if you find a bumblebee nest.