A cluster of small grey/ in the leaf mould,they were about 1cm long.
No interactions present.
I think they could be but they are not likely enough for an ID.
There's some similar observations on this American blog:
We tend to call bibionid flies "St Mark's Flies", from the time of emergence of the largest species, Bibio marci, around St Mark's day. I hadn't realised that the Americans call them "Love Bugs", I wonder why? As adults they are often seen mating so perhaps that's the reason?
Entomologist and biological recorder
Lat/Lng: 54.62756, -6.71378
OS grid ref: NV958360