Bats are a protected species in Britain. I watched a program about a couple who were renovating/restoring a historically listed building to live in. There were bats nesting in a specific area under the roof. The couple by law would have to continue to provide that resting/nesting spot for the bats. You can't just simply get rid of them. You can be arrested if you do.
Never buy a home in the hysterical district .
seems like someone shoulda had an oopsie and turned the gas stove on and opened the attic door