I spotted this a couldn't identify it!
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though could well be a whitethroat
Whitethroat has a very definite eye stripe as does the lesser whitethroat.
Could even be a Lesser Whitethroat........definitely a Warbler of some sort.
I would be very surprised to find that it wasn't a female blackcap. It is the only one that fits the photo.
The identification certainly seems plausible!
Eye stripe not so pronounced in female Whitethroat an is dark. The eye stripe of the male is light and not always as distinct.
My impression is of a female whitethroat, as per Alladell, also I would expect to see a whitethroat perched exposed like this but less so a blackcap, which in my experience is much more of a skulker.
Whitethroat on structure and plumage - and it does look like a female.
Lat/Lng: 55.8, -3.2
OS grid ref: NT2665