Nature documentary series. 4: Bats.
Lionel Kelleway spends a chilly summer night at a disused stone mine near Bath, home to nine of the sixteen species of British bats. Hundreds of bats swarm to the mine. But why they do it is a mystery. Producer Joanne Stevens. E-MAIL: nature@bbc.co.uk WEBSITE: www.bbb.co.uk/nature/programmes/radio