On a nettle leave. Boundary of a farm field (Oil Seed Rape) and a broadleaved woodland.
No interactions present.
What are the features that indicate it is this species?
More general 'jizz' than anything else ... but
Just to note that the ones I photographed were on Urtica diocia as you say but there were several of these (or at least things that looked very similar) on other plants as well.
Lat/Lng: 51.808, 0.1055
OS grid ref: TL452142