Confidence: I'm as sure as I can be.
Notes: Appeared smaller than honeybee; c.10mm long. Loafing in cool weather in the 'hay-meadow' of our back garden. Pale face, ginger thorax and darker abdomen, but didn't note (nor get a good picture) of tarsi. Have other pictures of what seems to be the same species taken last year. Might not be identifiable from these pictures, I guess.