> a glass-fronted cell

Be careful what you wish for, Helen. In Sam Coates's podcast (The Rest Is Politics) this morning, there was a horrible screaming match between two cats: the one that Sam's the staff for, and next door's ("his nemesis," said Sam). They were apparently nose-to-nose and giving it everything, in the sure and certain knowledge that the pane of glass between them meant that neither would have to actually follow through with claws.