A swarm of honey bees has landed in your garden and you may have been surprised how close you were to them before you noticed the rugby ball shape of bees. IF they have just arrived they are not a threat, they have already sent out scouts to look for a new home and IF the warm weather continues they will be moving off soon for their new home, which MAY be your chimney!
You may also search the British Bee Keepers database here →www.bbka.org.uk you will see photos' of various bees so you can see if your bees are honey bees.