No interactions present.
The key feature which clinches it is the notched back to the head, only shared by the very rare and very different Formica exsecta.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Don't forget the smell from this species, a sort of lemon / citric acid mix that I have not come across with any other UK species.
Tachinid Recording Scheme
TRS Facebook Page
Lat/Lng: 51.6, -5.1
OS grid ref: SR8998