Despite failing his bid to win the London Marathon, Mo Farah left no doubt that he would return for a second tilt at the title.
"I will be back, one hundred per cent. I'm not going to finish on a down," he said.
Champion runner Haile Gebrselassie was recruited as pace-setter in an effort to encourage a record time - but forecasters said the heat may have had an influence on the race.
A 25-year-old man sacrificed a personal best time to ask his girlfriend an important question - but said getting down on one knee was "pretty difficult".
Tony Phoenix-Morrison from Hebburn was running for Cancer Research UK with a Smeg fridge weighing more than six stone strapped to his back.
Labour politicians Ed Balls, Andy Burnham and Sadiq Khan posed for selfies in their running vests before the race began.
Former Liverpool and England striker Michael Owen took part in the race, along with Emmerdale's Tony Audenshaw, presenters Sophie Raworth and Jenni Falconer.