Elizabeth line trains which travel on the Great Western and Great Eastern Main Lines are now travelling through the central London tunnels*
This film visits both tunnel portals and more. It also includes some of the alternative services which still travel into the central London terminus stations (Paddington, Liverpool Street)
Mostly filmed in November 2022 but with a few earlier scenes
*But at present Great Eastern (GE) main line trains only go as far west as Paddington station
