This handbook draws together ideas for modifying, enhancing and creating roosts for lesser horseshoe bats based upon the experience of The Vincent Wildlife Trust over more than 16 years. It is aimed primarily at ecological consultants who may come across this species whilst undertaking bat surveys and who subsequently need to provide mitigation strategies to enable development work. Theoretical aspects of the species' roosting ecology and appropriate survey techniques are presented, as well as clear and practical advice on improving and adapting buildings as roosts. It also addresses wider landscape issues regarding the importance of commuting and foraging habitats as well as how they can be maintained and improved for lesser horseshoe bats.