This morning Enzo had an accident when she didn't have a litter tray. We had taken the tray downstairs to clean it and while we were down there Enzo needed the toilet. Like the good housetrained cat that she is she put her doings is a easily cleaned place, on the card board mat that we normally put the tray on. So in the end it ended out fine, I only hope that she doesn't make a habit of it.