In a BBC interview recorded for his birthday today, the Prince said he is reducing his own workload and winding down before he reaches his "sell-by date".
The Duke of Edinburgh, who has been married to the Queen for 60 years and is the longest serving royal consort, turns 90 today. In an interview at Buckingham Palace with Fiona Bruce, broadcast on BBC1 last night, the Duke even claimed he was losing his memory and struggled to remember peoples names.
Prince Philip is involved with around 800 charities and organisations, says he is looking forward to winding down and enjoying himself.
"There is an ageism in this country, as everywhere, and quite rightly so, because I think you go downhill – physically, mentally and everything," he said.
In a wide-ranging interview to mark his birthday, the Prince discusses his life, work and interests over the past nine decades.
He told Bruce: "I reckon I've done my bit, I want to enjoy myself for a bit now. With less responsibility, less rushing about, less preparation, less trying to think of something to say. On top of that your memory's going, I can't remember names. Yes, I'm just sort of winding down."
But Philip stressed that it was time for him to take a back seat. "You don't really want nonagenarians as heads of organisations which are trying to do something useful," he said.