Bat O was found by a bunch of school kids at a nearby primary school. They were lucky they weren't bitten. O is large and quite aggressive, but her teeth aren't as needle sharp as the smaller bats. "O" is a Greater Long-eared Bat, the first I've seen. She weighs 12 grams and has a wingspan of 30cm. She is a giant compared to Maddie and Nick, who weigh 4 grams and only reach 15cm tip to tip.
The Big O.
There is nothing wrong with her so I'll let her go tonight, and if it's as warm as last night I'll let Nick and Maddie go too. It's quite possible she has a pup in a roost somewhere, so it's vitally important Big O goes as soon as possible.
I'll see if I can get photos, but she's pretty wriggly and hard to hold safely. Luckily she's large enough to have a scruff-of-the-neck.