What is the purpose of HS2 going to Manchester airport? Surely people able to make a quicker journey south would go to Heathrow which has more destinations and is cheaper once you get there. Are people from Watford really going to go to Manchester airport?
Please advise!
It has no purpose at all. HS2 is a fast railway to London. For every 100 people arriving at Manchester Airport, I doubt if more than two are heading to London.
The last thing the airport needs is a second railway station, which is why the airport won't pay for it.
HS2 Manchester does need a station accessible from the suburbs, but not at Davenport Green, where space will always be expensive, because of the airport.
IMO, much better locations for peripheral stations would be on the A6144 Carrington Spur Road and at Guide Bridge, both with direct access off the M60.
So NPR would go Liverpool, Warrington low-level; across Carrington Moss; tunnel to Piccadilly; surface to Guide Bridge Parkway; tunnel to Marsden; Huddersfield; then onto Bradford or Leeds.
HS2 would use the same Carrington alignment to approach Manchester from the West, call at Piccadilly and terminate at Guide Bridge, where there is plenty of space for the depot.
The same Western approach could also carry Manchester - Scotland HS2 traffic and NPR Leeds-Man-Preston services. Even with four tracks, Carrington Moss would need fewer tunnelled km than the loop around by the airport.
You could also build an interchange station where HS2 crosses the M56, which would pick up HS2 trains from Liverpool, Preston and Manchester.