An improvising bumble bee, taking a short cut to the nectar.
No interactions present.
It is probably one of the lucorum complex. Nectar-robbing like this is a feature of both these species.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 51.796765702234, -3.6892175674438
OS grid ref: SN836122
Nant Llech (SSSI), the woods behind Wales Ape and Monkey Sanctuary, near Henrydd Falls.