Possibly worth scanning some Buddleia in the East Lothian coastal towns just now. Sketchy reports coming in of Camberwell Beauty!!
Its certainly possible. Nothing concrete yet by way of photographs has come to light though there are rumblings from Dunbar and further south around Berwick upon Tweed. Cannot really be more specific. It is possible that a few made it over on the north easterlies that brought a bunch of migrants in early Summer. I will repost if I hear anything more.Iain.