Let me take you back to the Britain of 1951. The Second World War had ended just six years earlier. London, like many other British cities, had been bombed relentlessly and still bore the scars of the Blitz. Surviving buildings were covered in layers of dark sooty dust and rationing was still the order of the day and, for fresh meat, remained in place until 1954.

Visitors who arrive in London via Heathrow Airport will pass the Hogarth roundabout in Chiswick as they approach the city along the A4 from the west. They may see the house in which William Hogarth (1697 – 1764) lived, which is now a museum. Their Blue Badge Tourist Guide may even tell them that it is believed that Hogarth’s habit of sketching people’s faces on his thumbnail gave us the phrase ‘a thumbnail sketch.’