No interactions present.
It looks like the continental sub species carbo which is common on inland waters in the UK - although other birds are beginning to show more white now they are approaching the breeding season.
Shag does not have any white or generally occur inland
As far as I am aware the gular pouch angle is the only reliable feature for separating carbo from sinensis and I cannot make that feature out in any of these images.
Some discussion on these threads.
That's a very interesting comment Andy, I have never heard of continental subsps. How come, though, it has the same spp. name (carbo)as our more common UK bird?
That should have been sinensis for the subspecies name
Lat/Lng: 53.5, -2.3
OS grid ref: SD8700