Last night, after watching ‘Climate Change: The Facts’, the BBC’s terrifying synopsis of what we have done to the planet, and where it is taking us, I went upstairs to my kids’ bedroom and watched them sleeping for a long, long time.

I watched their chests rise and fall, breathing the air we take for granted, perhaps dreaming of the coming Bank Holiday weekend, when they will play in the sunshine we still see as a blessing rather than an enemy. And I thought: When are you going to tell them that their safe world is falling apart?