With high certainty, bees in a bird box will be a type of bumblebee, rather than a honey bee (the bees kept by beekeepers that make honey). Beekeepers can only help with the removal of honey bees. A bird box is too small for a honey bee colony and is very unlikely to have been selected by honey bees as a nest site as the space is just too small for a honey bee colony.
To determine if the bees if the bees are honey bees there is identification information on the British Beekeepers Association website at
What can be done about them?
That depends on whether they are a nuisance. If people are getting stung, you may need to consider removal. OBKA may be able to help remove honey bees but not bumble bees. However, if the bees are not causing a problem, we advise leaving them alone as they are valuable pollinators. Bumble bees occupy a nest for one summer and then die. By the end of the year they will have gone.