BBC - The £15 Billion Railway Series 3 (2019)

Follows the construction workers of Crossrail as they battle to finish the final stages of the new Elizabeth Line underground railway beneath the streets of London. Costing over fifteen billion pounds and stretching 120km across the capital, this extraordinary construction project is one of the biggest in Europe and one of the most ambitious engineering feats in Britain since the time of Brunel.

Chapter 1:
Our cameras follow the engineers, technicians and train staff who are under pressure to complete their section of the project, including building and fitting out ten brand new stations, learning to drive the new fleet of trains, and testing the 21km twin tunnels beneath London, in a bid to make it safe for the public. We join Danny O'Connell, Crossrail's testing manager, as he leads a critical operation to launch the very first train into the new Elizabeth Line tunnels under London. Danny is responsible for trialling and testing all aspects of the railway performance – from communications, CCTV and platform doors, to the trains, tracks and signalling systems. If Danny can't complete all of the hundreds of tests needed to prove that it's safe and reliable, the railway won't open on time.

Chapter 2:
Our cameras pick up immediately after the shock news that the Elizabeth Line has been delayed by over a year and will cost hundreds of millions of pounds more than planned. The show discovers how engineers, technicians and train staff must pull together - working on borrowed time - to build and fit out ten brand new stations, learn to operate the new trains, and test out the new 21-km twin tunnels under London, before it can open to the public. At stake are the reputation of the engineers, the reputation of the new railway and the reputation of British engineering. Project manager Lih-Ling Highe is back to lead the installation of thousands of kilometres of vital power cables through the largest station on the Elizabeth Line – Tottenham Court Road. Tottenham Court Road is also expected to be one of the busiest underground stations attracting 200,000 passengers a day. If the cables are damaged or incorrectly wired, the station cannot be switched on and the project will be delayed once more.