... or just the half of a fruit that has been attached to the tree?
:). Enjoyable comment. The tree is a Viburnam sp. the other half of the apple was in another tree being claimed by another blackcap (and at one point, his two girl friends)
Interestingly this male was aggressive in comparison to the other-one which is probably why he remained single.
Lat/Lng: 50.4, -4.2
OS grid ref: SX5058