The bats - Egyptian and possibly the Little Red Flying Fox?

A much better shot than any I managed - when I visited there was a lot of condensation on the windows, which is not conductive to photography!

@TeaLovingDave there was loads of condensation on the closest window to the roosting colony, but they'd wiped down the window next to it. Even with the feeding bowl in the way I'm pretty happy with it.
Also helped that as I was sorting the focus out someone opened the door and illuminated everything nicely!