Found a queen wasp in the hall buzzing round the light this morning! That's the third wasp in the last three weeks. Fortunately it flew out when I opened the front door.
I have no idea where they are coming from. After the first one appeared in mid-November, I removed the extract fan vent covers and fitted fine metal mesh there before replacing the cover. There is no way a wasp could get through. We haven't had a window open for ages, so they can only be coming through the doors.
Anyone else noticed these unwelcome house visitors being more frequent this autumn/winter?