As I write this it’s unclear whether the current British Government will survive. Amidst the chaos, spare a thought for the civil servants who have to keep the show on the road. They’re incredibly important.

For a description of why their expertise matters, read Michael Lewis’s new book The Fifth Risk. It’s terrifying. There’s no other word for it. It examines what’s been happening in the transition from the Obama to Trump administrations.

Lewis interviews people who worked in three of the most ‘boring’ and misunderstood government departments — Energy, Agriculture and Commerce. Actually those departments are responsible for nuclear safety, the US food supply and predicting the weather — including tornados. Without their expertise and knowledge, the US would be an extremely dangerous place.

You could sum up his conclusion on the machinery of government as ‘I think you’ll find it’s more complicated than that’. It takes dedicated, intelligent, experienced people to make things work. The implications of the complete failure of Trump’s people to understand this are scary but perhaps the worst is the nuclear threat. That’s where the title of the book comes from. The first four risks rattled off by the person who used to run nuclear safety are fairly obvious — a dirty bomb, a broken arrow and so on. But the fifth risk is ‘project management’. There is no evidence that the Trump team understands that and good people further down the organisation are leaving in their droves.

Fortunately, we have far fewer political appointments in the UK so the majority of the machinery of Government remains when you have a change of political leadership. I know ‘experts’ are out of favour at the moment, but I for one am very glad they exist.