A simple pub sign led me down a very disturbing rabbit hole

The cleanliness, or otherwise, of a pub’s pipes has never bothered me before. But that was before I read about the potential yeast, bacteria and mould ... There’s a pub near me with an eye-catching sign outside.

I’ve driven past it many times, and it always gives me pause for a little idle thought. On the sign there is a loud and proud notice that in this pub they clean their lines every week. There’s a lot going on with this simple sign. First and foremost, in a long life of pub observance, I don’t recall ever reading such a boast adorning any other establishment. What’s going on…