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This is certainly a bee. It is a male Lasioglossum, and could be one of several species.
Thanks Stuart, how can you tell the genus and sex from the photo, quite a large genus
A lot is down to long experience!
Male Halictines tend to have long antennae and look rather long and skinny. No male bee has any pollen collecting hairs either.
The abdominal hair bands are on the forward part of each abdominal plate - a feature typical of Lasioglossum (cf Halictus when the hairs are on the rearward edge of the tergal plates).
Yes I can believe that it's down to long experience!
Lat/Lng: 52.1, -3.4
OS grid ref: SO0451