Quite a large fly, with long legs and proboscis.
No interactions present.
Robber-fly ( Asilidae ) or Empis sp. ?
Robber-flies do not have the long proboscis.
My Flickr photos...
Many thanks both. Fascinating!
This species is new to me.
Lat/Lng: 51.2367, 0.2986
OS grid ref: TQ605511
On herbaceous vegetation along ride.