Due to open in 2020 2021, the tunnels of the Northern line extension will be a little bit special. They'll be the widest tunnels on the tube network. Current tube tunnels really aren't that wide.

It's already marked on Google Maps (see above), and is close ... 2019 according to TfL's schedule. Have new tunnels been built for the Northern line extension? Yes, two new 3.2km long Northern ...

Transport for London on Thursday said that the final cost of the extension, which will link to the Northern line at Kennington ... Major construction on the 3km twin-tunnel extension began ...

a Victorian-era well and existing Victoria and Northern line tunnels. ‘This achievement brings us a significant step closer to the delivery of the first major Tube extension in nearly two ...

The Northern Line extension ... Tunnelling for the £1.2bn Northern Line extension will begin in March, Sadiq Khan has announced. A pair of two-mile long tunnels, drilled by custom-built machines ...

Miners are tunnelling part of the Northern Line extension by hand in an operation ... Northern line while trains are still running. They tunnel 24 hours a day, seven days a week but progress ...

Image: TfL The construction of two tunnel boring machines (TBMs) which will build the tunnels for the Northern Line Extension is now complete. The 100 metres long machines were built by NFM ...

Two tunnel boring machines – affectionately ... way under south London in March as part of the £1.2 billion northern line extension. The extension, which has over doubled in cost since we ...

Transport for London on Thursday said that the final cost of the extension, which will link to the Northern line at Kennington ... Major construction on the 3km twin-tunnel extension began ...

Tunnelling for the £1.2bn Northern Line extension will begin in March, Sadiq Khan has announced. A pair of two-mile long tunnels, drilled by custom-built machines, will connect the Tube line to ...

The Tube map has been redrawn to include the first new extension to the London Underground this century. Nine Elms and Battersea Power Station have been added, ahead of the opening of the Northern ...

A pair of two-mile long tunnels ... connect the Tube line to Battersea, south London. New stations at Nine Elms and Battersea Power Station are due to open in 2020. The extension, which will ...