Tola Shura Kitata of Ethiopia stayed with Kipchoge until close to the end, but the 2015 and 2016 champion strode clear to win with a time of 2:04:17 -- 2:20 off the world record.
The British track great, who won gold in the 5,000 metres and 10,000m at the past two Olympic Games, admitted his second full marathon had taken its toll in a race where there was a world record pace at the halfway point.
The men's race was won by Kenyan Eliud Kipchoge in two hours, four minutes and 16 seconds.
He overcame early setbacks that put him way behind leader Kipchoge but still registered a time of 2:06:32 to break Steve Jones's British record achieved in 1985.
"They were going for world record pace", Farah said. I was knackered at 30 kilometres and he just stepped up another gear. 'I still enjoy the win and I'm happy to be able to win for the third time in London'. Kenyan Cheruiyot, 34, crossed the line in 2hr 18min 31sec, three minutes outside the 2013 mark set by the British runner.
"Eliud Kipchoge's consistent dominance of the marathon, a grueling event where so many things can go wrong, is unparalleled".
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Mobile water stations had to be deployed, says the The Daily Mail, after some of the static stations ran out of bottled water to give runners. I went to pick it up but it was the staff. "I had to get it right".
"I'm just enjoying life to be honest and I think that's what's helping".
Among them was Rob Pope, who set the record for the fastest marathon in a film costume as he took to the streets of London dressed as Forrest Gump and clocked a near-elite time of 2:36:28.
In the women's race, it seemed like three-time victor Mary Keitany was headed for a huge win, but she seemed to be struggling in the final seven kilometers of the race with Cheruiyot taking advantage to burst to victory.
Elsewhere on the track, six-time Paralympic gold medallist Weir won the men's wheelchair race for an unprecedented eighth time. Mentally and physically, I felt better coming into this. "I can't do any better than what I did".
McFadden had been forced to miss racing in London a year ago after surgery for blood clots and was glad to be back. At the beginning when I used to do marathons my endurance was rubbish, so I'm keeping the speed and gaining a bit more endurance base.