Trains are incredibly expensive. Both making the lines and using them. Judging by HS2 it costs around £200 million per km of track. And it also costs around £

Trains are incredibly expensive. Both making the lines and using them. Judging by HS2 it costs around £200 million per km of track. And it also costs around £0.5 per mile to use and door to door travel times are generally 2-3x higher on public transport. Trains are NOT a solution.