body length about 20-25mms not counting ovipositor
No interactions present.
I don't know this group well enough to be able to say whether or this is Dolichomitus, although it certainly looks the right shape. But there are quite a lot of species in that genus, and as far as I know microscopic examination is required to identify them fully.
Entomologist and biological recorder
Lat/Lng: 50.9, -3.7
OS grid ref: SS8712