Sorry, I’ve Got No Head - a kids show, but has a lot of familiar faces (if you watch British comedy).

Witchfinder sketch

Makes sense for numbering floors - ground is zero. How many floors should there be between -1 and 2?

A decent guide to tea grades here. Even with higher end teabags, any tea dust created (e.g. if the teabag gets squashed) gets trapped inside the bag. The tea dust makes for a more bitter cup.