Marloes Mere produced a Whimbrel, all three hirundines, ten Wheatear, a Sedge Warbler, and five Whitethroat.
Down on Marloes Sands for the evening, a Whimbrel and a pair of Wheatear on the beach, with another four together in a field by the valley, a single Chough, eight Swallow including a pair in of the sea, probably from Skokholm, by the car park eight more House Martin, probably fresh in from Skokholm.
The birds in Andy's picture look a bit like Dotterel? Seems perfect time and place for them.