The Latest Breaking News from Margaret Thatcher

She was a mentor to a record 15 prime ministers — and never breathed a word about the secrets that they divulged to her.

On her 21st birthday, 21 April 1947, when Britain’s Princess Elizabeth was accompanying her parents and her sister on a tour of South Africa, she spoke “to all the peoples of the British Commonwealth and Empire, wherever they live, whatever race they came from, and whatever language they speak”.

From Winston Churchill to Liz Truss, Queen Elizabeth ll worked with 15 British prime ministers in her 70-year reign. Here are some key moments that give insight into their relationships with the Queen.

There has never been, and perhaps never will be again, a British monarch like Queen Elizabeth II

Charles automatically becomes king after his mother passes ‘peacefully’ at Balmoral

Faced with hard reality of looming energy bill crisis, new PM will backtrack on ideological vows within days of taking office

Liz Truss’s No 2 followed in Thatcher’s educational footsteps, studying chemistry at Somerville, but did not pass her exams

Truss' blink rate tripled, which 'points to an increase in stress levels' and could mean she has no confidence in what she was saying

What we are about to get is the exact opposite of Thatcherism: an inflationary boom where we try to live beyond our means, but delivered with Thatcheresque determination, writes Sean O’Grady