As opposed to the opening of phases 2a/2b. While the track connection linking the Birmingham spur with HS2 to the north will be operational from day 1, no revenue services will be using it as the current plan is for Curzon Street to initially only have trains to London.
If the track connection will be there, I’m not sure why there’s a need to wait until phase 2 before passenger services from Curzon Street to Manchester and Scotland can commence. It’s not like coming off at Handsacre will make the journey slower as domestic trains making the same journey still have to trundle through Wolverhampton. The only other reason I can think of is that it will sever direct links beyond Birmingham (Glasgow to Milton Keynes and Manchester to Bournemouth etc), but then that will be happening anyway with the phase 2b plan (assuming this doesn’t get canned).
If the track connection will be there, I’m not sure why there’s a need to wait until phase 2 before passenger services from Curzon Street to Manchester and Scotland can commence. It’s not like coming off at Handsacre will make the journey slower as domestic trains making the same journey still have to trundle through Wolverhampton. The only other reason I can think of is that it will sever direct links beyond Birmingham (Glasgow to Milton Keynes and Manchester to Bournemouth etc), but then that will be happening anyway with the phase 2b plan (assuming this doesn’t get canned).