Prince Philip is set to appear on a new set of stamps in honour of his life

Royal Mail have announced it will be releasing four new stamps in honour of the Duke of Edinburgh.

A collection of four black and white images of Prince Philip – who died last month aged 99 – depicting him in various stages of his life will go on sale from 24 June.

Royal collectors will be able to get their hands on the mini sheet for £6.65.

Simon Thompson, chief executive of Royal Mail, said: "Throughout adulthood, the Duke of Edinburgh dedicated himself to the service of this country, the Commonwealth and to the many causes he was involved with.

"For more than seven decades he was at the centre of our national life. His passing is a key moment in our history which we mark with this set of commemorative stamps."

Philip - who had been married to Queen Elizabeth for 73 years - passed away "peacefully" at Windsor Castle on the morning of 9 April, just a few weeks after being hospitalised with an infection and heart condition.

A statement from Buckingham Palace at the time said: "It is with deep sorrow that Her Majesty The Queen has announced the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh. His Royal Highness passed away peacefully this morning at Windsor Castle.”

Despite his health problems in the months prior to his death, Philip's passing was registered as being due to old age.

The first commemorative stamp was issued for the British Empire Exhibition in 1924.

Since then, six to nine sets of commemorative stamps have been issued each year.