London Underground celebrates 150th anniversary
10 January 2013 Last updated at 08:01 GMT
Events are taking place to mark the 150th anniversary of London Underground.
On Wednesday night, a steam train recreated the journey of the first underground train, carrying people three and a half miles from Paddington in west London to Farringdon, just outside the City.
Although it was only seven stops, it was an instant hit, attracting 40,000 people on its first day.
Richard Westcott reports.