I have a wasps' nest in the house. They get in through a hole high up in a spot of mortar - near the bathroom.
I came home from holiday (I always close internal doors when I go away) only to find the kitchen awash with dead wasps and live ones trying to get out of the kitchen window - hot weather while I was away, I suppose. I think they get in somewhere near the washing machine or above the gas boiler. There were some in the bathroom as well but a lot fewer. None in any other room. This is the first time I've noticed any.
I was advised to contact the Council's Pest Control Department so I did only to be told that they don't 'do' pest control any more. What do I do now. I'm forever vacuuming picking up dead wasps and letting out the live ones.