Oh, dear, what can the matter be

Three old ladies locked in the lavatory
They were there from Monday to Saturday
Nobody knew they were there

Having escaped the loft earlier, this piece of childhood doggerel popped into my head. That verse was all I knew. Oh the wonders of the internet and Google. Turns out this is just the chorus and there are three more verses (one per lady). Lyrics for Three Old Ladies. Mind you this hit was buried amongst other pages that I suspect were not suitable for younger viewers.