Solitary bee feeding from Cowslip

Solitary bee feeding from Cowslip

Observation - Solitary bee feeding from Cowslip - UK and Ireland. Description: This small bee was as you can see feeding at cowslips. I thought due to the dark vein along the leading edge of the wing that it would be easy to identify, but having looked through the photo's at BWARS I am not sure, so any help gratefully received.

This small bee was as you can see feeding at cowslips.

I thought due to the dark vein along the leading edge of the wing that it would be easy to identify, but having looked through the photo's at BWARS I am not sure, so any help gratefully received.