This time last year Brian Thomas was recovering from critical injuries after collapsing while walking near his home in west Wales.
After spending four weeks in a coma, he was told by doctors that he would remain in hospital for more than a year and that it could take up to five years for him to fully recover from his injuries.
Today, he took part in the Cardiff Half Marathon, to raise money for the A & E unit of Withybush Hospital, who helped him after his collapse.
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The world record attempt will raise money for the foundation set up in memory of the Olympic gold medallist, who died in May 2013.
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