Volucella zonaria

Volucella zonaria is Britains largest hoverfly.  Completely harmless, a hornet mimic whose lavae live in wasps nests.

This one is a female and I photographed it in my garden in Cleethorpes, North East Lincolnshire today.  It's a species that is spreading northwards because of global warming.

I'm not an Entomologist, the above information is courtesy of my friend (and Ecologist) Bill Meek.  Thanks Bill. 

Olympus EM5ii with Leica 12-60mm lens.