Around here that would mean that they have built a nest in the bush, but I think they look for more shelter in the UK, don't they?

A lot of people think that Hoverflies are wasps, google to see images and check that it's not them you're seeing.
If it IS them LEAVE them because they're valuable pollinators.

I would suspect hoverflies too wasps and bees don't hover.

i agree theres a hover flie that looks like a wasp and a honey bee.

I asked a similar question the other day and it turns out that they are hoverflies. I spent ages looking for a nest. Not sure how to link to my question but if you can find it there is a picture of the insect.

Thanks very much for all your answers .....I will google hoverflies. I feel soo stupid at times!!!

You are not stupid Kirsty you simply didn't realise that hover flies look like wasps and bees.

after all the whole reasen ( moving on from moons answer ) have taken millions of years to look like insects that are a lot more dangerous to there potential predetors so as moon sais your not stupid xx .