Apparently, males were seen yesterday in one of the Fermyn Woods woods but not in Fermyn Wood proper and Lady Wood / Souther Wood. Males have also been seen in Bucks and Oxon, including a bundle of five together over a territory near Bicester.
Numbers are still very low everywhere apart from around the M25 corridor and at Knepp, which is almost on a different planet anyway. So, it's still early days except around London and at Knepp, and it hasn't been reported yet in Wiltshire.
Here's a male pausing during sallow searching, at Knepp today -
And here are several members of The Wildlife Trust's Exec Team suitably prostrate, at Knepp this morning (plus a baronet and Milo the Knepp Castle hound) -