The Elizabeth line will stretch more than 60 miles from Reading and Heathrow in the west through central tunnels across to Shenfield and Abbey Wood in the east.
The new railway - currently being built by Crossrail Ltd - will stop at 41 accessible stations, 10 newly built and 30 newly upgraded, and is expected to serve around 200 million people each year.
Crossrail Ltd announced in August 2018 that more time was needed to complete the section through central London.
New financing was agreed with the Government on 10 December 2018. Find out about Crossrail's plan to complete the Elizabeth line.
TfL and Crossrail construction sites have been temporarily suspended. Work on project sites will stop to help limit the spread of coronavirus.