Posted: 24/04/2013 at 10:12
Sadly, you answer the question of the decline of bats in your first post.
The more people who renovate barns and old houses, the fewer places there are for bats, swifts and swallows and house martins.
Please leave room under the barge boards and suchlike so that the bats have somewhere to roost. Winter roosts are often quite different from summer roosts. Bats mainly use space in the roof for their breeding roosts. Don't stop them getting in!