[NB to get passenger services off other lines because they dramatically reduce freight capacity]
As for the costs...well, some people in the UK don't want power lines, don't want wind turbines, don't want nuclear power plants, don't want anything in fact except the freedom to continue living their comfortable ruralish lives while the rest of us starve and die out and preferably just go away. They do, however, want Waitrose and possibly Sainsburys to keep on functioning and possibly their electric lights.
If there's a price to be paid - they're not going to pay any of it. So everything is a battle, and it's not an autocracy so a government that wants to be elected again has to think twice before taking on enemies.