Always find yourself talking about the old tube ticket machines and how the child option was always worn out and a single fare was about 60p - it's really not that long ago but now you can find out precisely both forward and back.

The Tube Time Machine will help you work out what you'll be paying to ride the tube in another 10 years time so you can get ready to grumble early.

Have a play around - all in the name of fun and based (future costs at least) on the rate of inflation in the past years.