London’s new Elizabeth line has officially opened to the public. This project, valued at GBP 19 billion, is not only a big milestone for the British railway industry but for all Londoners. Alstom, global leader in smart and sustainable mobility, has supplied trains, technology and infrastructure for this new line and will also maintain the trains. The transformational railway will reduce journey times, create additional transport capacity, improve accessibility and provide a huge economic boost to the capital and beyond. The Elizabeth line will be operated by MTR Elizabeth line as a concession of Transport for London.The new railway through central London uses Alstom’s Class 345 Aventra fleet between London Paddington and Abbey Wood station. The state-of-the-art trains, already in service between Paddington, Heathrow Airport and Reading on the west, and also run between London Liverpool Street and Shenfield on the east. The seventy 7- and 9-car trains have been designed and built at Alstom’s Derby factory and are maintained by Alstom at Old Oak Common depot in West London. Alstom will maintain the trains for the next 32 years as part of the rolling stock and services provision contract.The Alstom-led ATC joint venture, formed with partners TSO and Costain, has designed, constructed, tested and commissioned critical infrastructure works for the new 55-kilometre line. ATC has delivered the traction power supply for the trains, incorporating Alstom’s in-house feeding systems, non-traction power supplies for the stations, shafts and portals, tunnel ventilation systems and other electrical and mechanical systems, laid the track (including 5500 HAS sleepers), and built a new maintenance depot at Plumstead. ATC has been the Principal Contractor for the entire railway construction, managing safety, logistics, testing and commissioning between more than twenty interfacing contractors.