Yes the key is definitely missing. I looked through the Caves today to check if someone had locked it in there. No joy. It's also not in the kitchen, unless it's somewhere really silly.
Sign out sheets always need to be stocked up in the drawer in the kitchen. Nobody has signed out the key to the Caves since 27th, according to some scribble on the back of one of the sheets. I'm wondering if someone has taken it away with them, or locked it somewhere silly?
Maybe we should get some new keys cut for the place and leave a set available for kitchen managers too, just so we don't have to ring round everyone from the caves when they're missing and someone's booked the space and is waiting in the cafe?