These were on a leaf, I think from a fuschia.
No interactions present.
A tiny wasp the Gonatocerus triguttatus is more than likely responsible.
This certainly looks like a gall, but does not fit the description of the one known gall on Fuchsia in this country (a mite named Aculops fuchsiae). This was recorded at Kew in 2007 and cannot survive low temperatures so is unlikely to be found in Scotland anyway.
The suggestion of G. triguttatus is interesting but all I can find out about it is that it is an egg parasitoid of grapevine pests, not a gall-causer.
Are you sure about the plant ID?
Lat/Lng: 57.9734, -3.9885
OS grid ref: NH824999
Gardden backs on to pine wood. Leaf possibly off an old fuschia plant, but not sure.