this is a derelict dovecote in which wasps have been building a nest all summer and are still active.
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Many thanks. I would try to provide a better photo of the beast, but I have this strange reluctance to get any closer, this is with the longest zoom on my camera!
Lat/Lng: 50.8013, -2.2309
OS grid ref: ST838002
near orchard trees and pond, this entrance facing due south.