Originally Posted by Britseye
I believe it's widely accepted common knowledge in the south-west that these are British (probably Welsh?) birds moving down and back up. I think someone from the south-west stepped in on the discussion and alluded to this fact before I had the chance to do so?
Think that may have been yours truly? Apologies
(Although perhaps more likely to be wandering birds from the introduced population (Scotland/England) than what was the more sedentary Wesh pop... ??)