Let me say this up front. I am an unalloyed Rachel Johnson fan. Like most of the Johnson family, she is an adornment to our national life, even if she sometimes puts her foot in it. Her recent memoir of her time in Change UK and the LibDems, Rake’s Progress: My Political Midlife Crisis, was a brilliantly written and very amusing page turner. If it hadn’t been published right at the start of Covid, it would have troubled the bestseller charts.