I don't agree. I would say they need to equally aim for that and convenience of access by car, because that maximises ridership and thus minimises the use of cars on journeys into urban areas where they cause most harm. (Remember most journeys are suburb to city centre, not city centre to city centre, something which most railway enthusiasts and the railway itself often seem to disregard).
High Speed Rail isn't a solution to that though. You could get the same benefits improving P&R facilities at Zone 6 tube stations or on the West Midlands Metro, and making suburb/satellite town to city centre rail links better (which hs2 capacity release will help with on the London-MK-Northampton corridor).
What an M25 Parkway should be designed for is long-distance travel, after all airports have plenty of parking too, but that's because we don't build them in city centres. However, for the reasons I outlined in my last post, whether it's the best solution is debatable.
Unfortunately the ground underneath London is pretty much full. Crossrail 2 would provide some relief to Liverpool Street, Kings Cross and Waterloo but there's nothing in the pipeline for relieving Euston and I don't believe that there is a remaining clear route under the centre other than the one earmarked for XR2.
How come Paris has significantly more space for tunneling? It's got a metro network denser than the tube yet there's plenty of space for numerous RERs.
Manchester Airport HS2 is irrelevant to the airport. People aren't going to go there from London to fly somewhere, and it supposedly won't carry Manchester<->Airport passengers at all so as not to block seats for longer reservations. It is a parkway station that happens to be located near (but not at) the airport, and in some ways perhaps should just be called Manchester South Parkway!
For travel to London you're right, but it's also planned to be on NPR, and high-speed airport links to other locations in Northern England are actually useful in order to reduce the strain on local, fairly poorly placed airports such as LBA, DSA and Newcastle. Plus there's a lot of jobs at the airport - not many jobs in greenfield land off the M25. Sure, many of these commuters will be taking local transport, but the LMR makes living in Liverpool/Warrington and working at MAN feasible too.
Yes, this function is provided for at the Northern and Midlands cities but not in London. It's almost like the only basis on which it was designed is getting people *from* the regions *to* London and all other use cases have been disregarded, though Birmingham Interchange will at least allow for journeys north.
London itself has low car usage even in the outer suburbs and it should stay that way. Commuter rail into London from the Home Counties is also significantly better than in the WM and North. A Chiltern Mainline upgrade + the freed up capacity on the southern WCML post HS2 would adequately serve most people who'd use M25 parkway without adding more traffic to the M25.
It's dire. It's infrequent, often delayed or cancelled, and there are a lot of older units i.e. 15x and 323s about most of which are not air conditioned. I don't blame people for refusing to use it.
Sure, 195s and 331s are decent, but the operation as a whole is absolutely shocking and totally unfit for purpose in a large city in 2026.
You aren't going to get the Range Rover brigade using it, I'm afraid. Metrolink they might, but Northern, no chance. About the only even vaguely acceptable heavy rail commuter service in Manchester is the Hadfield/Glossop and the Blackpools, but even that isn't ideal.
All the older units will be long-gone by the time HS2 reaches Manchester. By the time the rail network will have enough capacity to make winning over the range rover brigade worthwhile, commuter trains on Northern will be all EMUs and BEMUs with level boarding, aircon, decent parking at outer stations and ample capacity. Given the prospect of numerous years of GBR with a subsidy-cutting goverment at the helm, we may not see any Metrolink tunnels, Leeds metros or any Crossrail-style projects, but it'll be significantly more pleasant. Meanwhile, the roads get more congested and covered in potholes.