No. Half of those could be solved using full length trains. To pick out one example about capacity birmingham to the north west. As long as 4 car voyagers are plying this route any case for increased capacity need is laughable. Let's start running trains of full length wherever they are needed. Rather than throwing money at a problem that may not exist.
And the other elephant in the room is Covid. There is no certainty that passenger levels will even get back to 2019 levels, let alone grow to the huge extent being predicted a few years ago.
My argument is far less money, could be spent far more cannily for far better results than hs2.
The lengthening of services could happen easily before HS2 is due to open, in fact the government could announce tomorrow that they are ordering 20*7 coach 80x's for XC to start using in 2022 and it cost the government next to nothing to do so.
Anyway XC make up a fairly small percentage of the trains on the network.
Also lengthening services would only increase capacity by a fairly small amount of the total.
HS2 was predicting 33% increase between 2014/15 & 2029/30, 1/3 of the way through that time actual passenger numbers were already half way through that growth.
Covid-19 will impact passenger numbers, however any economic impact would likely hit car ownership much more. Having a car for mostly the school run is likely to be cut, as would a car for a job which no longer exists or for a job which only needs occasional travel to the office.
In fact I've spoken to one person who's thinking about getting rid of their only car and someone who has got off one of their two cars due to the changes from Covid-19.
That's not a scientific survey, but it's probably highlighting some of what's happening across a broader range of people.
With cars costing an average of over £3,000/year if you count all costs, you can see why people are rethinking if they need a car.
Whilst zero car use is impossible, we only need a 6.25% switch from road to rail to increase rail use by 50% of the miles traveled in 2019. As such even a drop of 20% could be more than offset could fairly easily be offset.
I refer you again to the graph which shows the spending on enhancements to the existing rail network, which shows we've spent £30bn yet few would say that the railways have improved by much.
