Transport for London (TfL) has pledged £25million to upgrade facilities as part of its takeover of a major line through Waltham Forest - and promised to improve reliability. 

As of May 31, the Chingford to Liverpool Street service, currently operated by Abellio Greater Anglia, will become part of London Overground. 

With no new trains expected until the summer of 2018, TfL has pledged to deep-clean stations and the current rolling stock, and install new ticket machines. 

The investment programme will see upgrades on all 28 trains and across 23 stations serving the route between Chingford and Liverpool Street, to Enfield Town and Chestnut via Seven Sisters. 

TfL’s director of London rail, Jonathan Fox, said: "From day one of transfer, passengers can look forward to seeing staff at all London Overground-managed stations while trains are running with turn up and go available for those who need it, in line with the rest of TfL services. 

"In a rolling programme, all of the stations will be deep cleaned and repainted, with new, modern ticket machines, improved travel information facilities, better lighting and CCTV systems along with gating at a number of stations. 

"The existing train fleet will also be cleaned and refreshed ahead of new trains coming into service from 2018. 

"Oyster and contactless will continue to be available for customers and an announcement with the detail on the new fares that will apply from 31 May will be made shortly. 

"However, it is not anticipated that there will be any fare increases or any changes to printed single tickets or point-to-point season tickets."

Mr Fox said TfL's primary objective from May 31 is to improve reliability and customer satisfaction. 

Turn up and go allows disabled people who need assistance to arrive at stations and have staff help them without being asked to book in advance.

The number of journeys into Liverpool Street during peak times will stay the same, although TfL has said it its working with Network Rail to see if services can be increased. 

The roll-out of 30 new electric, metro-style trains is expected to be complete by the end of 2018. 

Eight separate trains will replace the current diesel trains on the  Gospel Oak to Barking line. 

London Overground Rail Operations Ltd (LOROL) will run the services until November 2016 when the concession is put out to tender.