Doorbell required, you’ll be needing a toilet roll then.

I’m not sure of the randomness of algorithms but this is the result of shopping online.

A simple task of looking and then ordering a doorbell brings up this suggestion and confirms that the computer is not always right. We have, like any self respecting middle class family, a comfortable supply of what we naturally call  “bathroom tissue”. What we do not have is a handy fire extinguisher, the other suggestion, which was the obvious result of checking out the toilet rolls.

bogroll