We do, as a new Government, have to be extremely careful after 18 years in opposition. A lot of people who worked for us, they then go on and work fo… - Tony Blair

If we take all this actions and if it turns out not be true, we have reduced pollution and have better ways to live, the downside is very small. The other way around, and we don’t act, and it turns out to be true, then we have betrayed future generations and we don’t have the right to do that.

Leaders have the courage not to go with the flow. They speak up when others stay silent. They act when others hesitate. They take the risk, not because they fail to identify it as risk but because they believe a higher purpose means the risk should be taken. They’re prepared to say what needs to be said, including to their own supporters.

Often these changes demand structural reform on a large scale. My experience of governing is that changes usually fit into two categories. First, there are changes which are one stroke of the legislative or administrative pen – such as abolition of a tax or setting a minimum wage. They’re important. But the process of government in respect of them is relatively straightforward.