You learn a new thing everyday!

On the tube today explaining to my supervisor that I don't know the names of the tube lines so I go by colour he ended up testing that theory-found to be true.

This progressed to him pointing out that all the different lines have their assigned colour within the trains. A eureka moment if I do say so myself!

I was also told he believed that either Old Street or Angel has the longest escalator in the underground system.

You do learn a new thing every day :)