Thatcher’s long ministry of nearly a dozen years is often mistakenly described as ideological in tone. In fact Thatcherism was (and is) essentially pragmatic and empirical. She tackled the unions not by producing, like Heath, a single comprehensive statute but by a series of measures, each dealing with a particular abuse, such as aggressive picketing. At the same time she, and the police, prepared for trouble by a number of ingenious administrative changes allowing the country’s different police forces to concentrate large and mobile columns wherever needed. Then she calmly waited, relying on the stupidity of the union leaders to fall into the trap, which they duly did.

She fought and won two pitched battles with the two strongest unions, the miners and the printers. In both cases, victory came at the cost of weeks of fighting and some loss of life. After the hard men had been vanquished, the other unions surrendered, and the new legislation was meekly accepted, no attempt being made to repeal or change it when Labour eventually returned to power. Britain was transformed from the most strike-ridden country in Europe to a place where industrial action is a rarity. The effect on the freedom of managers to run their businesses and introduce innovations was almost miraculous and has continued…

Thatcher’s strongest characteristic was her courage, both physical and moral. She displayed this again and again, notably when the IRA tried to murder her during the Tory Party Conference in 1984, and nearly succeeded, blowing up her hotel in the middle of the night. She insisted on opening the next morning’s session right on time and in grand style. Immediately after courage came industry. She must have been the hardest-working prime minister in history, often working a 16-hour day and sitting up all night to write a speech. Her much-tried husband once complained, “You’re not writing the Bible, you know.”