Tunnelling in London for the Crossrail project has been completed.
Prime minister David Cameron and mayor of London Boris Johnson celebrated the completion of the tunnelling programme by going 40m below the capital to thank the team that is constructing the east-west railway.
The final tunnel boring machine (TBM) breakthrough at Farringdon marks the end of three years of tunnelling works.
Eight 1,000t TBMs have bored 42km of new 6.2 diameter rail tunnels under London.
Construction is also advancing on the 10 new Crossrail stations and on works above ground west of Paddington and east of Stratford. Over 10,000 people are currently working on Crossrail, including over 450 apprentices.
Cameron said: “Crossrail is an incredible feat of engineering that will help to improve the lives of working people in London and beyond. The project is a vital part of our long term plan to build a more resilient economy by helping businesses to grow, compete and create jobs right along the supply chain.”
Construction on the £14.8bn project began in May 2009.
The first Crossrail services through central London are scheduled to start in late 2018.