Family devastated by sudden death of Sir David Frost's son Miles
The family of broadcaster Sir David Frost have spoken of their devastation after his eldest son died suddenly 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.
As his family gathered to come to terms with their grief they spoke of a "wise" and "loyal" son and brother who had led the family since Sir David's death.
His mother, Lady Carina Fitzalan-Howard, said: "Miles quite simply was born an old soul. And everybody was drawn to his wisdom, love, loyalty and laughter."
Mr Frost's two younger brothers - Wilfred, 29, a TV presenter on CNBC's Worldwide Exchange programme, and George, 28, who runs a drinks company - added: "Miles was the kindest and most generous brother we could have wished for. Since dad died he was the leader of our pack.
"Everyone who Miles met immediately fell in love with his warmth, selflessness and incredible sense of humour. He has gone far too soon and is so undeserving of this."
Lord Chadlington, a long-standing friend of the Frost family, 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.
"I am an investor in some of the companies he was involved in and we were planning what we were going to do in October and November. We were looking forward together and there was no hint of anything amiss."
Lord Chadlington said the family are now "hunkering down" together as they come to terms with their grief.
"They are a very close family, very much a loving family, and they will sustain each other through this as they have other problems," he said.
Actor Sir Roger Moore said he and his wife were shocked at the news.
He said: "Kristina and I were shocked to learn Miles Frost has died. Our thoughts are with Lady Carina. He was a wonderful boy taken far too soon."
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.
His company website says that his personal network "includes some of the most respected names in business and media", many of whom have invested with Frost Brooks.
He was also a board member of Paradine Productions, Sir David's TV production company; BizEquity, which enables business owners to gain an online value of their company; and parcel delivery firm Parcel Monkey.
Last year Mr Frost, his brothers and Lady Carina were joined by 2,000 guests, including the Prince of Wales, for a memorial service at Westminster Abbey in Sir David's memory.
Sir David was a television star for more than 50 years and was known for his incisive interviews - most famously with disgraced US president Richard Nixon.