Why are there wasps in my bathroom?

Wasps will build nests in wall cavities, loft spaces and just about any other suitable void they find.
They can enter the house easily through an open door or window – or more cunningly through a vent, such as the type you find in bathrooms.
Read more about Wasps
What’s the difference between wasps, bees and hornets?

There have been even more wasps, bees and hornets around this summer than normal.
It could be partly down to the summer heat wave, with the warm conditions causing fruit and flowers to ripen earlier.
But you saw a yellow and black striped insect flying around the garden, would you know if it was a wasp, bee, or a hornet?
What to do if you’re attacked by a swarm of wasps

Wasps typically sting when they feel threatened according to Natalie Bungay, technical officer at the British Pest Control Association (BPCA). A wasp in distress emits a pheromone that sends nearby colony members into a defensive, stinging frenzy.
Wasp nests calls to pest control rise fivefold

Wasp nests are keeping pest controllers five times as busy across the UK, according to experts.
In the UK, search interest in the word “wasp” has been the highest in five years between 5 and 11 August, according to Google Trends.