London Underground Ad Campaign, Spring 1915: “Why bother about the Germans invading the country - invade it yourself by Underground and the motor bus.”

“Wolmar quotes from a study into the Jubilee extension by the Centre for Land Studies. The author, Don Riley, worked out that the £3.5 billion spent on the line had increased the value of the land along its route by £13 billion.”

A mordant sense of humour and an obsession with house prices? That is why we shall prevail. And prevail we shall.