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Inside London's £15 billion Underground upgrade which opens next year

Business Insider UK Logo By Russell Sheldrake of Business Insider UK | Slide 1 of 27:  London's massive upgrade to the existing underground system, which will be known as the  Elizabeth line once it opens, is the  biggest construction project ever undertaken in Europe. The £14.8 billion project, which connects 30 existing stations with 26 miles of new tunnels, is now roughly 90% complete after work started in 2009. The permanent track was  finished this September, which means trains are now able to travel the full length of the tunnel. Services from Liverpool Street to Shenfield will open in December 2018 with the full line being operational by the end of 2019.

London's massive upgrade to the existing underground system, which will be known as the Elizabeth line once it opens, is the biggest construction project ever undertaken in Europe.

The £14.8 billion project, which connects 30 existing stations with 26 miles of new tunnels, is now roughly 90% complete after work started in 2009.

The permanent track was finished last September, which means trains are now able to travel the full length of the tunnel.

Services from Liverpool Street to Shenfield will open in December 2018 with the full line being operational by the end of 2019.

The section of the line that will be operational from December 2018 have now been illustrated on an updated Tube map.

© Flickr / Transport for London
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