I think that that is a B. soroeensis, but it’s hard to tell from that picture.
I thought that B. sorrenensis (spelling ?) was a rare / uncommon species.
So, I agree, try to get a better photo !
Yes, they seem to be most recorded in the North of Scotland, so if it is one then you’re lucky!
Thanks Guys - I have another photo but it’s blurred - I thought it might have been Barbuts Cuckoo but not sure - Will keep an eye out and hopefully see again. (I’m a flower farmer and have four acres of garden that I’m in all day so see plenty!)