A £4M upgrade of Waterloo station has been completed during the Easter engineering works window.
The package is part of the bigger £800M upgrade which is being undertaken at the station to increase capacity by 30% by 2018.
Network Rail said over 7,000 hours of work went into replacing key sections of track and installing a new signalling gantry at the station over the three day period.
A new signalling gantry now extends over platforms 1 to 8 and work paves the way for platforms 1 to 4 to be extended in the major three and a half week closure in August this year.
Network Rail route managing director Becky Lumlock said: “The £4M investment we have delivered this Easter weekend brings us another step closer to boosting the capacity at Waterloo by 30% for passengers.
“I’m pleased to see that our Railway Upgrade Plan is continuing to make a real difference in providing more space for passengers and making the railway more reliable. I’d like to thank passengers for their patience while we have carried out our work.”