Passengers using the capital’s Tube and rail networks are set to benefit from increased capacity and more frequent trains.
From next week the Waterloo & City Tube line will operate longer opening hours and offer more trains on weekday evenings.
Transport for London says trains will run every three and half minutes until around 9.30pm, then every six minutes until 11.30pm, followed by a 10 minute service for the last hour.
On Saturdays the line will run until 12.30am, an extension of six hours, with a train every six minutes until around 11.30pm and every 10 minutes for the last hour.
Circle Line passengers will also gain increased frequency during peak times, including during the morning rush hour when trains will run less than two minutes apart.
Announcing the changes, Mayor Boris Johnson, said: “The Tube is already more efficient than ever before, zipping passengers across our city to their homes and workplaces like a well-oiled machine.
“Now we are increasing services on the Waterloo & City and Central lines, giving passengers what they have asked for and helping to further ease congestion.”
TfL is also working to increase capacity on the London Overground and Docklands Light Railway.
It has appointed a contractor to lengthen London Overground platforms on the East London and South London lines ahead of introducing longer trains next year.
Work is also set to begin on increasing capacity on the Docklands Light Railway route between Stratford and Canary Wharf/Lewisham and on the redevelopment of Pudding Mill Lane station.