Last night, about midnight, I'm sat at my desk and suddenly realise that the strange chirping noise isn't the radio after all.
Open the window and all I can hear for the next 10 minutes is what must have been a bat flitting around the rooftops.
Obviously we have different bats up here, because the occasional one we used to get around Brookfield Road was quiet. This one sounded like it was having a party.
Or maybe the one we heard in Birmingham was just drowned out by the seemingly constant whir of the police helicopter overhead?