Marsh Harriers -- Marloes Mere

Two marsh harriers over Marloes Mere this morning, I was leading a bird guided walk starting from the car park (initially both birds could be seen easily over the hedge from the car park hut). Both females, a well-marked bird with a lot of white on head, shoulders and upper wing coverts, and a dark bird with pale coloration on head only, possibly a first summer bird? Excellent views had by all.
Also shoveler, three black-tailed godwits, etc.
(Richard Ellis, National Trust)