Swept in chalk grassland. No clue as to what it is or whether Lepidoptera or Hymenoptera. There were twothis the biggest.
No interactions present.
I am familiar with the Abia species but the ground colour is paler with dark markings. But thanks for the suggestion which has helped me to what appears to be the right answer Tenthredo thompsoni
Lat/Lng: 51.6609, -0.9582
OS grid ref: SU721963