"There is a lizard in the tea room."
There was too. It's a type I usually refer to as the nearly legless lizard.
Quite likely a Glaphyromorphus, though exactly which one is hard to be certain.
I caught the little guy, took it outside and released at the edge of a garden. It will be much happier there, tile is not a very good place to be for a lizard that moves like a snake.