Hover flies are welcome in the garden their larvae eat aphids. There are 280 species of hover fly in Britain. Lots of them are yellow and black and could be mistaken at first glance as a wasp or bee. They do not sting or bite .
They belong to the family syrphidae part of the order Diptera , the true flies.
Not many of them have English names so Latin names are used .
They are fascinating I’m ordering a new identification book about them. These two below are very different one like a flattened wasp and the other like a bumble bee.
Bees have four wings flies only two.maybe . Helophilus pendulus will confirm when new book .Volucella bombylans
Keep a look out for these fascinating flies.