No interactions present.
If it is as big as it looks, you are right. I have had a number reported in the past few weeks.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Not taken by me but sent to me, but I believe it to be pretty large. The reddish eyes and the reddish antennae I think point towards sudeticus rather than bromius too reading some of the posts on the dipterests forum.
Lat/Lng: 54.93605, -4.51647
OS grid ref: NX388630