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This bee has what appears to be a small beetle attached to its tongue. This is most probably a species of Antherophagus which are known to be phoretic on bumblebees http://www.jstor.org/stable/2456423
This observation of an Antherophagus waiting for a bumblebee: http://www.ispot.org.uk/node/273300?nav=search
I did wonder what it was!
Lat/Lng: 54.5, -6.0
OS grid ref: NW4526