I'm stuck with this fly. It's not a soldierfly but is very metallic. The 3 reddish longitudinal stripes through the eyes are quite striking.
No interactions present.
Thanks, Roger. It looks like there's not an obvious recording scheme for this family, or anyone to send it to so I'll let it go in the morning.
Lat/Lng: 50.6857, -1.5261
OS grid ref: SZ335874