Bletchleyite
Veteran Member
Also, why is it that "the missing bit in the middle still needs to be upgraded to ETCS?". Classic Compatibles will be running on Conventional signalling on most of the Network Rail parts of their journey, wherever they run.
And all HS2 stock will be classic compatible. There is no longer a plan to order captive stock at present, and there would be little benefit of doing so. Those 400m trains are pretty big, so it'll be a long time before the only real reason to do so, double deck, will even nearly be required.