In reply to silhouette: I whilst I'm banging on, another thing is that the "beyond HS2" trains are intended not to have tilt, which means they'd be slower once they come off HS2, than the current generation; Virgin have drawn attention to this and have pointed to recent Italian high-speed trains which have tilt for when they come off the high-speed line. Again, it's a legitimate concern but its not intrinsic to the project though it'll be spun as if it is.