Somewhat off topic, but UK law means any toilet in a licensed establishment is available for free. The law requires licensed establishment to provide free tap w

Somewhat off topic, but UK law means any toilet in a licensed establishment is available for free. The law requires licensed establishment to provide free tap water to anyone requesting it. A separate law requires somewhere that serves drinks to someone to give them access to toilets. So if you ask for free tap water, you can use the toilet.