Brave Briton Hayley Carruthers collapsed on the finishing line of the London Marathon after she completed a personal best time.
Carruthers, 25, a full-time radiotherapy cancer researcher from Birmingham and one of six elite Brits in the race, approached the line looking in pain before she stumbled and fell just metres before the finish.
With nothing left to give after running her best ever time, Carruthers crossed the line in 18th place in 02:33:59 on hands and knees before marshals rushed in to ensure her safety.
As she approached the end, BBC commentator Steve Cram said: "I hope she's okay, [she] looks very, very tired."
Suddenly, Carruthers' legs gave way and she fell to the ground. But fortunately, she was close enough to the end to complete the course.
As marshals rushed into help, Cram said: "She'll be okay, well done Hayley.
"Hayley has just run a personal best, she's okay, she knows she has to get across the line.
"She's run two and a half minutes quicker than she's ever done - what a brave effort."
After the race Carruthers tweeted: "Today I learnt how NOT to run a marathon! At least I PB'd" with a picture of her bandaged knees.
Fans who watched the race were full praise for the Brit.
Twitter user @GreyDayGirl wrote: "Ok...so watching Hayley Carruthers cross the line has just reduced me to tears."
Leanne Medland added: "Now there's determination. Well done Hayley Carruthers. So much respect."
The women's race was won by Kenya's Brigid Kosgei who improved on last year's second place to win her first London Marathon title.
She finished ahead of 2018 victor Vivian Cheruiyot, with fellow Kenyan and former three-times London Marathon winner Mary Keitany down in fifth place.
In the men's race Eliud Kipchoge of Kenya won for the second year in a row while Mo Farah finished in fifth.
