A solitary bee on a Marsh Marigold. Well trodden clay ground with bee holes is nearby.
I agree that it is likely to be A. flavipes. The other potential is A. gravida, but this is very rare, although you are in the right area for it.
A gravida is distinguished by white hairs on the face (dark in flavipes). Gravida has the hair bands white even when fresh rather than brownish (but fading to whitish) in flavipes.
Thanks for clarifying, Ian.
Lat/Lng: 51.365277, -0.01825
OS grid ref: TQ380647