There were three Extras doing a short routine after returning from a formation sortie at about that time. Perhaps they were using that callsign. Wx OK, but it started to rain shortly afterwards.

It’s Formation Training Week at NW, so lots of Yaks and Extras around.

Yes the Yaks were using the call-sign ‘Hurricane’, the Mustang was using the call-sign ‘Mustang’ so an easy conclusion to draw. It will be another year or so before a Hurricane will be seen regularly at Weald, the Yaks will then need to think up a new call-sign!