France has banned short haul domestic air travel on routes that could be travelled by train in less than 2½ hours.
It only affects 12% of French domestic flights but has a huge CO2 effect, cutting omissions per passenger by 85%.
As it is Continental internal air travel is 70% (pre-Covid) Brits as no-one in their right mind would opt for the airport hassle as opposed to jumping on a high-speed train two minutes before departure and leaving and landing in the centre of cities.
There are high-speed trains currently in service in Spain, Japan, and China I’ve been on that would do Wellington to Auckland in less than two hours but we don’t have the traffic to support that yet.
The day will come.