Rather slender hoverfly (?)
No interactions present.
Can't really put to species from the photo. There's a good chance it is H.pendulus, but it would need a good view of the face and hind tibia.
Note that in Helophilus hoverflies, the eyes are seperated in both males and females. In most other genera, the eyes of the males join.
Lat/Lng: 55.3821, -3.9817
OS grid ref: NS745115