Turnstones, or Ruddy Turnstones s they perhaps should be known in this global communication correctness, has two subspecies with the nominate form Arenaria interpres interpres has a huge arctic breeding range from NE Canada, northern Greenland, northern Europe and Asia to Alaska. Birds that winter in the UK are from the NE Canada and northern Greenland area as the European breeders winter in West Africa.
So, this young chap has likely come from Canada/Greenland, nice. But is it young and is it a chap? And looking at the paper by Meissner and Cofta, I'm still not 100% sure...
vast breeding range from northeastern
Canada, through northern Greenland, northern Europe
and Asia to northwestern Alnterpres