The five extra trains will be introduced from the beginning of next week.
Extra trains will be introduced on the Wimbledon branch of the District Line from the beginning of next week.
An additional five trains will run during the morning peak from Wimbledon Station into central London – leading to a 12 percent boost in passenger capacity.
The new timetable will be welcomed by thousands of Londoners who board the heavily congested service at Wimbledon Park, Southfields and East Putney Stations.
Putney resident, Luke Thompson, said: “Rush hour in the mornings can be a complete nightmare so any improvement is most welcomed.”
The improved service will be achieved by withdrawing the weekday shuttle service between Kensington Olympia and High Street Kensington.
Transport for London says this will reduce bottlenecks in the Earl’s Court area – speeding up journeys for the 150,000 customers.
Wandsworth Council has been calling for improvements to District Line services as part of the Wandsworth Travel Choices campaign.
Council leader, Ravi Govindia, said: “This is terrific news for people living in Putney, Southfields and Wimbledon who have had to put up with increasingly overcrowded trains in recent years.
“They can now look forward to a more frequent service and more room to breathe on their way into work.”
The District Line is the busiest sub-surface line in London, serving more stations than any other line, with over half a million passengers each week day.
Commuter David Curry said: “I live in Hammersmith on the District Line. I work in Victoria, but I normally get the bus to work because the District Line is so unreliable.
“They desperately need more trains on the line before I consider using it more frequently.”
Mayor of London, Boris Johnson, welcomed the news and said: “Hundreds of thousands of passengers will benefit from this practical and pragmatic change to markedly improve the most congested part of the tube network.”
