Had an hour this morning.
42 Teal, 4 Gadwall, 4 Tuftie, 1 Shoveler, 1 Pochard, 4 Moorhen, 1 Coot, 1 Little Grebe on river, Sprawk, Buzzard, 3 Reed Bunt, 2 Skylark west, Siskin, GSW drumming
No sign of any Bittern but who knows, you could stand there for hours and still miss them!