The garden was full of Chiffys and Willow Wobblers this morning, at least 4 Chiffs and 2 or 3 WWs. The Chiffs were being even more aggressive than the WWs. I remember years ago reading a paper about Willow Warbler pre-migration aggression and then seeing it first hand a few days later in Richmond Park. Sometimes they can be quite demented chasing almost anything. Not sure I can recall Chiffs being quite as aggressive as this previously though.
Walking back home across the fields this after' flushed a Grey Partridge and then a Little Owl from the usual spot.