The special edition coin features an original portrait of The Duke, which he approved himself before his death in April, aged 99.

The coin is available from the Royal Mint website, as well as post offices around the UK and special stockists across the Commonwealth and worldwide.

Chancellor Rishi Sunak said: “This coin is a fitting tribute to The Duke of Edinburgh, who moved and inspired so many people around the world with his decades of service both to the nation and Her Majesty The Queen.”

The coin bears the inscription “HRH The Prince Philip, Duke of Edinburgh 1921-2021” and will be struck by the Royal Mint.

The Duke of Edinburgh served as the President of the Royal Mint Advisory Committee for 47 years.

The coin is legal tender but has been designed as a limited-edition collectable or gift and will not be entering general circulation.