In all the tributes to Her late Majesty’s constancy, dignity, wisdom and devotion to duty, not enough has been said about her political cunning. But BBC1’s The Longest Reign: The Queen and Her People made a compelling case that Elizabeth II knew just how to tilt the balance.

When she toured the new towns of the 1950s (see image), waving at the crowds with their little Union Flags and taking tea with the young families on the just-built housing estates, she was giving her wordless blessing to the welfare state.