Charles & Camilla on the tube
The Prince of Wales and the Duchess of Cornwall hopped on the tube today to mark the underground's 150th birthday.
What's next - the Hogwarts Express?
After the royal couple's trip on the Metropolitan Line, Clarence House tweeted this picture of the Duchess of Cornwall at "Platform 9 3/4" at King's Cross station.
-
Steam train returns for 150th anniversary
A steam train which carried passengers in the 19th Century has returned to mark 150 years since the first tube journey.
-
Pictures: Stops along the Tube's 150 year journey
A look back at some of the stops on London Underground's 150 year journey.
-
150 years of the Tube quiz
All day we've been adding fascinating facts about the Tube, which turns 150 years old this week. Now find out how much you know.