this stunning little fly(?) was found while photographing lichen, sorry but it's my best shot!
No interactions present.
Yes, this is a fly, family Simuliidae (sometimes known as blackflies), probably genus Simulium as John suggests. Females of at least some of the species in this family can bite, but they are intriguing-looking creatures.
Entomologist and biological recorder
Lat/Lng: 51.4849, -3.1855
OS grid ref: ST177768