A runner who died after collapsing at the finish line of the London Marathon had complained of breathing difficulties during his training for the race.
Robert Berry said breathing was a "big struggle" in the weeks leading up to the event in a blog on his website, and suggested that high pollution levels and the Sahara dust could have contributed to his troubles.
"What a nightmare this morning was. Yesterday I did a gentle 5 miles as my breathing still not too good and knees a little achy." Today on the other hand my eyes were itching, nose running and breathing a big struggle, also in the office all day after the gym," the 42-year-old wrote.
"Was talking to Nicola from the National Osteoporsis Society via email and she seems to think this is not hay fever but due to pollution and the dust from the Sahara. Hope so as I don't want to be running like this during the Marathon."
Donations for the 42-year-old's charity, the National Osteoporosis Society, have topped £35,000 since he was named by organisers.
The National Osteoporosis Society has paid tribute to one of its runners Robert Berry, who died after completing the London Marathon. Claire Severgnini, the CEO of the charity said her "deepest sympathies" were with his family "at this tragic time":
It is with great sadness that the National Osteoporosis Society has learnt of the death of Robert Berry, one of our runners in this weekend's London Marathon.
The charity would like to express its heartfelt condolences to Mr Berry's family and friends. Our immediate concerns are for Mr Berry's family.
"He was immediately taken to one of our medical facilities where he was treated by four consultants, including one in emergency medicine. He was transferred to St. Mary’s Hospital, where he was pronounced dead.
"The organisers of the Virgin Money London Marathon would like to continue to express their sincere condolences to the family and friends of Mr Berry and our thoughts and deepest sympathies are with them all at this difficult time".
Well wishers have donated more than £11 000 to the charity supported by a runner who died at the finishing line of the London marathon.
Robert Berry, 42, was running to raise money for his "inspirational" mother, who had been diagnosed with a brittle bone condition.
He was raising money for the National Osteoporosis Society, when he collapsed and died despite receiving medical help at St Mary's Hospital in London yesterday.
On his JustGiving donations page, Mr Berry said he was undertaking the marathon after his mother, Ann Berry, was diagnosed with the condition aged 52.The total amount raised at 7pm stood at almost £3000.But by 9pm, there were more than 800 donations and the total amount raised stood at £11,284.13.
The London Marathon was "tinged with sadness" after a man collapsed and died at the finish line, the event's organiser has said.
The 42-year-old man, who has not yet been identified, collapsed immediately after finishing the race but later died in hospital.
"We did very unfortunately have one death of a runner, who had finished and our thoughts are very much with the friends and family of that runner," Hugh Brasher, race director of the Virgin Money London Marathon, said.
"Overall it was a fantastic day, but it always is tinged with a little bit of sadness when something like that happens."
A female competitor from Sierra Leone, who finished 20th in the women's race, has also gone missing.