No interactions present.
Going by the small size, general shape and the way it is holding its wings out I'd say this is a Picture-wing Fly of some kind. Most of these are in the family Tephritidae but there are some in other families. The pattern on the wing is vital to identifying these but unfortunately the wings are side-on in the photo.
Thanks, David. I did try to get more pictures but I remember that it flew off before I could do so.
It's another of the 'picture-wing' families, Pallopteridae, species Palloptera muliebris, a charming little fly. If you do a Google search there are lots of images, e.g.:
I don't know whether much is known of its natural history, but the family as a whole have larvae which are generally predators of other small insects, as far as I know.
Entomologist and biological recorder
Thanks for all the info, Martin.
Lat/Lng: 52.7, 0.3
OS grid ref: TF5820