Dom Dozier, from Norwich, had been training for months to prepare for his first marathon, held in Manchester on April 19. 

The 30-year-old said he had felt "really strong" going into the race and had regularly taken part in half-marathons with his run club over the past two years. 

Dom Dozier said he felt "really strong" on the race day (Image: Dom Dozier)

On the day of the marathon, Mr Dozier said he was fine until he started feeling light-headed just two miles from the........

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