Brown head and thorax and wings with darker markings. A Tephritidae I think.
No interactions present.
S. variegata looks good, but I don't know the group well enough to agree. Lots in the genus.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Looked this up on several internet sites after I was shown an insect book with a possible ID.
Lat/Lng: 50.72058, -1.84661
OS grid ref: SZ109912