I think my Mum may have a wasps nest in her cavity. I was there today and whilst sat outside in the sunshine I noticed a number of wasps coming and going in and out of one of her airbricks. If she has got a nest what's the best way of getting rid of it without resorting to demolishing the house wall!! The air brick is easily reachable for me to work on so any suggestions will be greatly appreciated.
Cheers
John