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Thanks guys. I did look at this one too but rejected it for some reason, the books say these two species are very alike. The yellow-orange scutellum is the clincher though, so I bow to your wisdom :)
Volucella should have a re-entrant outer cross vein. This specimen does not have this character, thus reinforcing the opinion for leucozona. It is not possible to see whether or not it has the plumose arista of Volucella.
Lat/Lng: 53.8, -1.8
OS grid ref: SE1540