I'm not sure if UK019 is in the same company but the system is the same for us and it works. Peeing pilot is replaced by an F/A. Flirting-chit chat goes on for a few minutes. Peeing pilot returns, knocks or buzzes, non pee pilot checks the camera or the F/A peeps through the peep hole and opens the door. Body contact sometimes occurs and everyone is happy. No risk, no cost, no altitude lost, no switches operated.