Wasp or bee?

Observation - Wasp or bee?. Description: This wasp or bee was with many others taking nectar from a large clump of ragwort. It was longer than the others (c. 1.25cm), had horizontal stripes (black on yellow) on its abdomen, a black on yellow design on its thorax and vertical stripes (black on wh

This wasp or bee was with many others taking nectar from a large clump of ragwort. It was longer than the others (c. 1.25cm), had horizontal stripes (black on yellow) on its abdomen, a black on yellow design on its thorax and vertical stripes (black on white) on its head. Unfortunately I didn't get a photograph.