The Government will also commit to banning the sale of all new diesel and petrol cars by 2040 in a bid to encourage people to switch to electric and hybrid vehicles.
No, not the way to do it. That’s to have government picking technologies again.
Instead, if this is what you really want to do, then set the emissions standards. Make them really tough, perhaps so tough that an ICE can’t meet them. But leave open the possibility that someone makes an ICE that does meet them.