We have discovered 7 large wasps in the house over the last week randomly on different days, usually late afternoon. Their appearance coincided with a log delivery so the general consensus is that they are Queens looking for a place to hibernate. I would expect an odd one at this time of year but 7 in a week so far seems a lot of Queens. Are they that numerous?
Length is around the size of a 50p, just under, so fairly large.