Swarming is the natural way for hives to split, most often occurring between the months of May and August. Whilst an imposing spectacle, there’s no need to panic.
Do you think you have a swarm of honey bees?
The British Beekeepers Association has an excellent page to help you distinguish between honey bees and other winged creatures, such as solitary bees and bumble bees. Also on the page, you can type your postcode and find the nearest beekeeper to remove the swarm. Beekeepers will only be able to remove honey bees, however.