Black bee (with blue abdomen tinge) for ID?

Black bee (with blue abdomen tinge) for ID?

Observation - Black bee (with blue abdomen tinge) for ID? - UK and Ireland. Description: Really interesting medium sized bee. Had a very distinctive way of feeding (abdomen tip touching flower while head has held high). Definite blue tinge to abdomen - and some pale hairs on head, thorax and end/side of abdomen.

Really interesting medium sized bee. Had a very distinctive way of feeding (abdomen tip touching flower while head has held high). Definite blue tinge to abdomen - and some pale hairs on head, thorax and end/side of abdomen.