If there’s any piece of information that interests me from the publication of the thousands of personal papers from the Margaret Thatcher Archive Trust, it is her pre-premiership crash diet. It was revealed for the first time that for two weeks in the run-up to her historic win as Britain’s first female prime minister, the self-styled Iron Lady stuck religiously to a diet which comprised 28 eggs a week (that works out to be 4 eggs a day), steak, salad & whisky. She also made it a point to tick off every item on a typed sheet of paper kept tucked …