What are the insects? In particular the one top left (greenbottle?) and the larger ones with buff-coloured wing bases.
No interactions present.
As well as the Mesembrina, there is a hoverfly Episyrphus balteatus (bottom right of umbel) and a small and possible Neoascia hoverfly (top right of umbel).
My Flickr photos...
Lat/Lng: 56.272075, -3.461992
OS grid ref: NO095098