Today we went for a walk around Wicken Fen and afterwards we ate at the "Maid's Head" in the village. We went all around the boardwalk route and got back in the car when we saw 4 swallows overhead and quite close. This, I think, is the latest time I've seen swallows up here in East Anglia. I have seen them much later in Devon, but most have gone south by now.