Train services that were withdrawn to allow maintenance work to take place, are being reinstated in December, rail firm Southeastern has said.
The firm said the timetable included several key improvements
The company said its latest timetable includes "several key improvements to cater for ever-increasing demand".
Extra services are planned from Ashford and Faversham, in Kent, into London, and mainline routes via London Bridge.
The firm also promised updated rolling stock and more frequent trains between Hastings, in East Sussex, and London.
Train services to be reinstated were made up of "a small number of early morning and late evening trains" previously withdrawn to give Network Rail more time for maintenance work, the company said.
Charles Horton, managing director, said: "We've committed to optimising the timetable."
He said the firm wanted to "operate more services and provide longer trains wherever possible" and "improve punctuality further".
Southeastern, which is owned by Govia, took over running trains in Kent, East Sussex and south-east London on 1 April.
The services had previously been run by the government subsidiary South Eastern Trains after Connex lost the franchise in 2003.