Sir David Frost’s family are grieving the loss of the late broadcaster’s son, after 31-year-old Miles Frost died while out jogging.
Miles - the eldest of David’s three children with wife Lady Carina Fitzalan-Howard - collapsed during a run near the family’s holiday home in Oxfordshire on Sunday (19 July).
Miles Frost with late father David in 2012
The financier was a keen athlete, and family friend, Lord Chadlington, said that Miles had showed no signs of any health problems.
Speaking about his death to the Daily Mail, he said: “Miles was a wonderful eldest son who was very well loved by all his friends and family. This is a terrible shock.
“I had breakfast with him last Thursday and he was in great form. There was no signs that anything was wrong. It just underscores the fragility of life.
“There will be a post mortem examination but all we know is that he collapsed while jogging.”
Miles (second from left) with his brothers and mother at David's funeral
Miles had previously completed a half marathon in the Lewa Game Reserve in Kenya, which is one of the most gruelling due to the altitude and heat.
He is survived by younger brothers Wilfred, 29, and George, 28, and mother Lady Carina Fitzalan-Howard.
Sir David died of a heart attack two years ago aged 74, while aboard the Queen Elizabeth II cruise liner.
Sir David Frost Memorial Service
Service to celebrate the life and work of Sir David Frost(01 of60)
(l to r) The Prince of Wales, the Duchess of Cornwall, the Duke of York, Princess Beatrice of York and the Countess of Wessex attend a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(02 of60)
Flowers lie next to a memorial stone for Sir David Frost following a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(03 of60)
Michael Parkinson during a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(04 of60)
The Prince of Wales (centre) lays flowers on a memorial stone to Sir David Frost as Frost's son Miles Frost (left) and widow Lady Carina Fitzalan-Howard (right) look on during a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(05 of60)
The Prince of Wales (right) speaks with the widow of Sir David Frost Lady Carina Fitzalan-Howard (left) following a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(06 of60)
The Duchess of Cornwall arrives for a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(07 of60)
(l to r) The Prince of Wales, the Duchess of Cornwall, the Duke of York, Princess Beatrice of York and the Countess of Wessex attend a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(08 of60)
The Duchess of Cornwall (right) speaks with the widow of Sir David Frost Lady Carina Fitzalan-Howard (left) following a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(09 of60)
The Prince of Wales is greeted as the Dean of Westminster John Hall (centre) looks on at a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
Service to celebrate the life and work of Sir David Frost(10 of60)
Alastair Campbell during a memorial service to celebrate the life of Sir David Frost at Westminster Abbey, London. (credit:PA)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(11 of60)
LONDON, ENGLAND - MARCH 13: Pippa Middleton attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(12 of60)
LONDON, ENGLAND - MARCH 13: Simon Le Bon and Yasmin Le Bon attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(13 of60)
LONDON, ENGLAND - MARCH 13: Simon Le Bon and Yasmin Le Bon attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(14 of60)
LONDON, ENGLAND - MARCH 13: Simon Le Bon attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(15 of60)
LONDON, ENGLAND - MARCH 13: Ann Widdecombe attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(16 of60)
LONDON, ENGLAND - MARCH 13: Terry Waite attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(17 of60)
LONDON, ENGLAND - MARCH 13: Sienna Miller attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(18 of60)
LONDON, ENGLAND - MARCH 13: Yasmin Le Bon attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(19 of60)
LONDON, ENGLAND - MARCH 13: Felicity Kendal attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(20 of60)
LONDON, ENGLAND - MARCH 13: Joanna Lumley attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(21 of60)
LONDON, ENGLAND - MARCH 13: Joanna Lumley attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(22 of60)
LONDON, ENGLAND - MARCH 13: Anne Robinson attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(23 of60)
LONDON, ENGLAND - MARCH 13: Jemima Khan attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(24 of60)
LONDON, ENGLAND - MARCH 13: Pippa Middleton (C) and Ben Fogle (R) attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(25 of60)
LONDON, ENGLAND - MARCH 13: Tania Bryer attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(26 of60)
LONDON, ENGLAND - MARCH 13: Simon Le Bon and Yasmin Le Bon attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(27 of60)
LONDON, ENGLAND - MARCH 13: Sienna Miller attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(28 of60)
LONDON, ENGLAND - MARCH 13: Simon Le Bon and Yasmin Le Bon attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(29 of60)
LONDON, ENGLAND - MARCH 13: Terry Waite attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(30 of60)
LONDON, ENGLAND - MARCH 13: Television producer Biddy Baxter attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(31 of60)
LONDON, ENGLAND - MARCH 13: Pippa Middleton (L) and Ben Fogle (R) attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(32 of60)
LONDON, ENGLAND - MARCH 13: Anne Robinson (R) attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(33 of60)
LONDON, ENGLAND - MARCH 13: Esther Rantzen attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(34 of60)
LONDON, ENGLAND - MARCH 13: Simon Le Bon attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(35 of60)
LONDON, ENGLAND - MARCH 13: John Sergeant attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(36 of60)
LONDON, ENGLAND - MARCH 13: Sir Terry Wogan and Lady Helen Wogan attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(37 of60)
LONDON, ENGLAND - MARCH 13: Claudia Winkleman and Kris Thykier attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(38 of60)
LONDON, ENGLAND - MARCH 13: Jemima Khan attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(39 of60)
LONDON, ENGLAND - MARCH 13: Peter Sissons attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(40 of60)
LONDON, ENGLAND - MARCH 13: Ronnie Corbett attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(41 of60)
LONDON, ENGLAND - MARCH 13: Sir Terry Wogan and Lady Helen Wogan attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(42 of60)
LONDON, ENGLAND - MARCH 13: Sir Terry Wogan and Lady Helen Wogan attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(43 of60)
LONDON, ENGLAND - MARCH 13: Anthony Andrews attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(44 of60)
LONDON, ENGLAND - MARCH 13: Princess Beatrice, Sarah Ferguson and Prince Andrew, Duke of York attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(45 of60)
LONDON, ENGLAND - MARCH 13: Dame Margaret Beckett attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(46 of60)
LONDON, ENGLAND - MARCH 13: Prince Charles, Prince of Wales and Dean of Westminster Dr John Hall attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(47 of60)
LONDON, ENGLAND - MARCH 13: Lord David Owen attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(48 of60)
LONDON, ENGLAND - MARCH 13: Ronnie Corbett attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(49 of60)
LONDON, ENGLAND - MARCH 13: Andrew Neil and Susan Nilsson attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(50 of60)
LONDON, ENGLAND - MARCH 13: Pippa Middleton attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(51 of60)
LONDON, ENGLAND - MARCH 13: Andrew Marr attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(52 of60)
LONDON, ENGLAND - MARCH 13: Rory Bremner attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(53 of60)
LONDON, ENGLAND - MARCH 13: Sir John Major attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(54 of60)
LONDON, ENGLAND - MARCH 13: Lord Sebastian Coe attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(55 of60)
LONDON, ENGLAND - MARCH 13: Eamonn Holmes attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(56 of60)
LONDON, ENGLAND - MARCH 13: The family of Sir David Frost, wife Lady Carina Fitzalan-Howard (2ndR) and sons Miles, Wilfred and George, attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(57 of60)
LONDON, ENGLAND - MARCH 13: Princess Beatrice, Sarah Ferguson and Prince Andrew, Duke of York attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(58 of60)
LONDON, ENGLAND - MARCH 13: Jemima Khan attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(59 of60)
LONDON, ENGLAND - MARCH 13: Sir Menzies Campbell attends a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)
The Prince Of Wales And Duchess Of Cornwall Attend A Memorial Service For Sir David Frost(60 of60)
LONDON, ENGLAND - MARCH 13: David Walliams and Lara Stone attend a memorial service for Sir David Frost at Westminster Abbey on March 13, 2014 in London, England. (Photo by Chris Jackson/Getty Images) (credit:Getty Images)