The bird was not relocated despite the best efforts of Jon and Owen. A report of a possible Black-headed Wag from the Dyfi (found by Chris Jones) appears to me to be a different individual - good photos from Marc Hughes. Several people have commented on the range of calls from B-H Wag in Cyprus,Egypt etc which suggest a greater variety of calls than I realised from my Lesvos experience. Which makes me happier that the Whitesands bird was a genuine B-h Wag and therefore maybe Pembs third following the Marloes Mere bird of a couple of years ago. Will have to check to be sure.
