By any measure, Prince Philip, who passed away on Friday at the age of 99, led an extraordinary existence.
The Duke of Edinburgh always walked a few paces behind the Queen, but for 68 years Philip upheld his oath of remaining Elizabeth's "liege man of life and limb and of earthly worship".
Prince Philip was also a lifelong petrolhead who owned and often drove in anger a number of classic cars. He was also a visitor over the years to the odd British Grand Prix.
In 1975, the Duc of Edinburgh paid a visit to the grid at Silverstone and dropped in on the Hesketh team to salute its proud owner, Thomas Alexander Fermor-Hesketh, 3rd Baron Hesketh, and future F1 world champion James Hunt.
Protocol was never at the forefront of the Hesketh team's priorities, but on that day, the boys were on their best behaviour.