Incredibly common today, seemingly on every plant of ragwort and every umbellifer, often in large congregations.
No interactions present.
Can you explain why it is likely to be that? I don't have a key to these and don't know what I am looking for! Any pointers would be useful.
My Flickr photos...
Lat/Lng: 53.92239259254, -0.84580510854721
OS grid ref: SE758479
Forestry Commission plantation being returned to wooded heathland