CC or WW?

I still struggle to tell the difference between a Chiffchaff and a Willow Warbler by sight. Luckily for me, this Willow Warbler, like many others this morning, was singing its little waterfall of a song. I went for a dawn raid - well, slightly after dawn, but still quite early - onto the Moorland fringe. There was a lot around, but it was pretty gusty so getting photos was not so easy. My best sighting was probably a group of 5 brown hares, although they would insist on hiding in a dip in the field, and the most surprising was a pair of Oystercatchers amongst the grazing sheep.(see extra)