I had lunch with my lovely Harper Collins publisher, Shona Martyn, at Café Colbert in Sloane Square. It’s one of my favourite chic, but casual London spots – and features in my new book, so that was pleasingly circular.

Through the window I could see an outside table of four young men – about 18 – all with the very specific heads of the English upper classes. Perfect skin, high colour on the cheeks, floppy hair. Also immaculately cut jackets, with jeans – and total social confidence.

Look, Shona, I said. There’s the Cabinet in twenty years time.

They just have the Bullingdon Club years to get through first.

The food’s not really all that at Colbert, but I adore the ambience and the service is so so immaculate. It’s the kind of place where I can order my favourite cocktail – an Americano – and not have to explain it.