David Frost’s eldest son Miles dies while jogging

Family friends have paid tribute to the eldest son of broadcaster David Frost, who has died at the age of 31.

Miles Frost collapsed while out jogging at the family’s home in Oxfordshire on Sunday.

Friends said the financial investor had appeared “in wonderful form” in recent weeks and there was no indication of any health problems.

Sir David himself died two years ago aged 74 after suffering a heart attack on the Queen Elizabeth cruise ship.

Lord Chadlington, a long-standing friend of the Frost family, said: “It is very sad and sudden. His family are very much in shock, but they are coping fine.”

He described Mr Frost as a “healthy man” rather than a fitness fanatic, saying: “He didn’t drink alcohol. He clearly led a life where he wanted to be as fit as he reasonably could be, and he liked having a few challenges.

“I had breakfast with him on Thursday and we spent the best part of two hours together. He was in wonderful form and it is a great shock to his family and friends.

Mr Frost was a financier and managing partner at Frost Brooks, a London-based private equity group.

Before founding the company, he spent five years at another private equity firm, LDC, working on technology, media and telecoms investments.