A serving army officer who died running just three miles from the finish line has been named.
David Seath collapsed suffering a cardiac arrest on Upper Thames Street.
Paramedics confirmed they were called at 1.45pm and the runner was taken to St Thomas' hospital where he later died.
Friends of David Seath have set up a JustGivingpage in his memory and plan to walk the final three miles of the marathon where he collapsed.
Captain David Seath, a fire support team commander in 29 Commando Regiment Royal Artillery, was running for the charity Help for Heros. He said on his fundraising page "the forces community need our help and continued support".
The Afghanistan veteran was from Arbroath in Angus and had created two masters degrees at the University of Aberdeen before joining the Royal Military Academy Sandhurst in 2009.
In 2012, Claire Squires a 30-year-old runner collapsed and died just one mile from the finish line at the London marathon. After Claire's death more than £1 million was donated to charity via her JustGiving page.