Time to wade in! Bats and their habitats and roosts are protected in Europe, please see link,
http://www.first-nature.com/bats/
So, they would have been on a hiding to nothing if they'd harmed the tiny thing. I am a bat lover, call me batty if you like(!), and recall reading one account of a bat conservationist keeping babies warm in her bra, to keep them alive, when they'd been orphaned... The native species in the UK are pretty small, and babies even more so - I think I recall reading that the teenager believed that it was her mobile 'phone vibrating - Who keeps their 'phone in their bra?
I guess in terms of rabies, the one recent case that was recorded was a bat conservationist, handling the bat without wearing protective gloves. Rabies might be found in around 3% of the native population, but it isn't really a problem in the UK, thankfully...
Blessings all :blowkiss:.