128 years after the circle line was completed, the capital now has a new orbital railway.
The final section of the London Overground - between Clapham Junction and Surrey Quays - has been completed and the line now runs in a full circle around the capital.
Today, the Mayor Boris Johnson climbed aboard for the official launch, joined by our Political Correspondent Simon Harris.
More top news
Research into property prices has found London has more areas with an average price of more than £1m than anywhere else in the UK.
A permanent memorial will be unveiled today in memory of murdered Middleton soldier Lee Rigby.
The desk and chair where Charles Dickens sat to write his final novels have been bought for the nation using a national heritage grant.