By this time last year we had been inundated with requests to collect swarms of honey bees. This year there have been far fewer calls and, so far, only two have been for honey bees. The rest have been about 'swarms' of bumble bees.
As much as I'd love to be able to spend time talking to people about bumblebees and their lifecycle I'm afraid that I have other calls on my time, so I end up suggesting they look online for more information and, you never know, they may even end up here on my small apiary's blog so I thought it might be a good idea to add post that might help.
The most commonly reported bee is the Tree Bumble, Bombus hypnorum.
This species was first recorded in Britain in 2001 and has since spread
northwards at a remarkable rate. Here's a picture from the BWARS site.