[1] The trains were planned to run on the Channel Tunnel Rail Link and Crossrail projects.

[1] Class 341 was intended as the rolling stock for the Crossrail project, and would have entered service in the late 1990s.

The Bombardier built Class 345 units were introduced in June 2017,[4] with the Crossrail project opening as the Elizabeth line in May 2022.

[5] Class 342 was intended to operate domestic services on the Channel Tunnel Rail Link (CTRL) high speed line between London and the Kent coast.

Domestic services began running in 2009, operated by Southeastern using Hitachi built Class 395 high speed trains.