So I snapped this little fella last week on the Green Breakwater, Fishguard Harbour. It was quite distant and not very approachable so its the best shots I got. There were also a couple of Wheatears and a whimbrel. It was certainly not one of those easily recognisable dazzling silver backed adults we see in the spring. It showed no discernable yellowish tinge around the face that I associate with our juvenile yarelli//pied Wagtails so was pretty sure it was a not native migrant white/alba. looking at lots of images on the internet there seems to be a lot of variability