Peter McNaught, operations director for the Victoria Lines, said:
Our engineers have worked tirelessly through the night and have successfully repaired the damaged signalling equipment.
A good service is now operating across the Victoria line.
We again apologise to our customers who were affected by yesterday’s disruption.
More top news
Sir Vince Cable has become the new leader of the Liberal Democrats, after no other nominations were put forward.
He is believed to be one of the oldest victims in a worrying spate of recent knife crimes.
The new leader of the council at the centre of the Grenfell Tower fire has told ITV News she will not resign 'yet' after a furious backlash.