Closterotomus trivialis
This was swept and was 7.9mm long. It wasn't immediately clear to me whether it was this species or Lucerne Bug Adelphocoris lineolatus, but after looking into it a bit I think the length of the rostrum (not reaching the hind coxae) rules out the latter. Other differences such as the length of the tibial spines seem to fit trivialis too, but are quite marginal.
 (1).jpg)
 (2).jpg)
 (3).jpg)
 (4).jpg)
 (5).jpg)
 (6).jpg)
female Closterotomus trivialis showing pronotum, rostrum, hind tibia and corium hair, Wendling Beck Environment Project (Norfolk, UK), 26th May 2025