No interactions present.
There are only 4 species of Syrphus in UK, but they are very similar. Two cannot be separated in the males, and all require a good look at the hairs on the eyes, the tiny bristles on the wings, and the colour of the legs for ID.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 54.6, -5.9
OS grid ref: NW5433