Does anyone know whether the contract to build the trainsets has already been awarded? Since the project was first announced, the top speed has always been quoted to be 250 mph (402 kph in real money), which is insanely fast and far more costly to build for and run than high speed trains running at 300 or even 330 kph.The latest generation trainsets build by the European manufacturers have a maximum operating speed of 350 kph, but you will hardly see any country running them faster than 330, and mostly not over 300, for good practical reasons.
It seems a waste of money to go ahead with commissioning trains capable of 250 mph if they are only ever going to travel at that speed to Birmingham. Just get some off-the-shelf 300 kph trains from Siemens or Talgo or whoever.