- Trains will begin arriving at the two new stops from around 5.30am on Monday
- TfL said estimated final cost of extending the line from Kennington is £1.1billion
- Power station to open next summer after being transformed into huge shopping, entertainment and office block
Transport for London (TfL) has unveiled a map showing the two new stations on the Northern Line following the first major expansion of the Tube network since the late 1990s.
Nine Elms and Battersea Power Station can now be seen attached to Kennington on the new extension, which will begin serving the new stops from around 5.30am on Monday.
It is the first major expansion of the London Underground since the opening of the extension of the Jubilee line from Green Park to Stratford in 1999.
Billions of pounds of investment have been pumped into the area in recent years, including through the redevelopment of Battersea Power Station and the building of a new US Embassy in Nine Elms.
The power station will open next summer after being transformed into a huge shopping, entertainment and office block - complete with more than 200 in-built apartments for the super-rich.
TfL said the estimated final cost of extending the Northern line from Kennington is now around £1.1 billion.
The Greater London Authority borrowed £1 billion for the expansion, which will be funded through business rates from the local area and around £270 million of contributions paid by developers.
The scheme takes the total number of Tube stations to 272.
Carl Painter, London Underground area manager responsible for the new stations, said: 'There is a palpable air of excitement behind the doors in both of our state-of-the-art new stations as around 100 staff get ready to welcome customers from Monday.
'London Underground stations have a long history of helping to define a neighbourhood's identity, in gluing communities together, and providing a highly visible landmark that helps visitors to navigate.
'We look forward to welcoming customers to the newest additions to the Tube network next week.'
The first train will leave Battersea Power Station at 5.28am on Monday and there will be an initial peak time service of six trains per hour on the extension, which will rise to 12 trains per hour by mid-2022.
Both new stations are in Zone 1 and Kennington has become a Zone1/2 station, to avoid penalising those using it as an interchange.
It means customers going to and from central London will only pay a Zone 1 fare.
Those travelling between Kennington and the city centre will also see their single pay-as-you-go fare reduced to £2.40, regardless of the time.
The fare zone change also means that those who travel from Kennington towards Balham, Tooting and Morden will also not pay any extra as a result of the extension to the 36-mile line, a TfL statement said earlier this year.
The Northern Line extension began in 2015 and was delayed three years ago due to 'miscalculations'.
It starts at Kennington and will terminate at the Grade II-listed Battersea Power Station, a decommissioned coal-fired plant owned by Malaysian investors.
The power station has undergone major redevelopment as the site of more than 100 retail shops, restaurants and cafes, including tech giant Apple's new 500,000 sq ft London campus.
Eateries include Gordon Ramsay's Street Pizza restaurant, No 29 Power Station West, Megan's Battersea, Tapas Brindisa, Wright Brothers, Fiume, Battersea Brewery and Tonkotsu, while much of the station has been converted into 253 apartments with some costing as much as £8.2million.
Andy Lord, Managing Director of London Underground, said in May: 'The Northern Line Extension will open up a whole new area of the capital, bringing the Tube to this part of London for the very first time.
