Although swarming can be alarming there really is nothing to be worried about. It is the way in which bees will vacate an unsuitable hive or reproduce and in their swarming state they are fairly docile as they have filled themselves with honey for the difficult task of setting up a new home. They may be seen hanging in trees or fences when they are gathering to get ready to move to their new home, which will have been previously scouted by worker bees.
Beekeepers try and prevent swarming, by ensuring their colonies have enough space in the hive or by artificially reproducing the swarm process so they can keep the bees in their apiary. Nothing works 100% of the time and some do get away.
It is also possible to catch swarms using bait hive techniques, which can be a bonus for the beekeeper.
If you find a swarm resting like this please contact your local beekeeping association and they will remove it safely to a new location.
Sometimes bees take up residence they shouldn’t and that’s when they become a nuisance to the householder. Again please contact your local beekeepers for advice, we do encourage people to try and live with the bees, and our members will not endanger themselves or your property in trying to remove bees.
Bees in the roof of chimney: Probably honey bees. If they are new to the site sometimes lighting the fire will drive them to a new site, however this will not work in a established colony
Bees in the shed: these are probably wasps, they are also an important part of the ecosystem. We do not remove wasp nests
Bees in my lawn : probably solitary miner bees best left alone
Bees in my compost heap : probably Bumblebees, vital for pollinating plants with deeper flower heads
Bees in my wall: Probably mason bees, leave them alone