The bidding process to find a new operator for London's Overground rail service has begun.

Transport for Lonodn has issued a notice with the Official Journal of the European Union to select the next train operator to run London Overground services from November 2016.

Bidders have until mid-May to register their interest.

During 2016, TfL will bring in new trains, higher frequency services and a continuing programme of station upgrades across its Overground services, which includes Harrow and Wealdstone.

The contract will also include options to introduce an all-night service at weekends. The new operator will be responsible for supporting these improvements and will be expected to continue to improve performance levels.

Jonathan Fox, TfL’s director of London rail, said: “This is a very exciting time for London Overground as we expand our fleet and serve new parts of the capital.

“This bidding process is vital to ensure London Overground’s performance is maintained and improved to make services even better for our customers.”