Unpopular opinion, but we need to start using hard and soft power if we want to fix this problem.
Europe cannot fix climate change on its own, and we already represent an increasingly small share of total emissions.
The question now is how we get other countries onboard fast, and if they continue to build out cheap coal-fired power stations what are we going to do about it? Something or nothing?
Unless we can get every nation onboard, we should switch strategies to one of managing the inevitable rather than hopeless trying to prevent it. Costly energy policies that reduce global emissions by roughly 0.5% (basically what will happen if the UK ever achieves net-zero) are a total waste of money and time.
Those who care about this issue need to get real and need to stop pretending that the solution is for a few more people in the UK putting solar panels on their roofs. Climate change is a global problem. If your solutions are domestic then they're not serious.