The four-time Olympic champion, focusing on road racing after ending his glittering track career, followed Ethiopa's Tola Shura Kitata over the line.
But it was a controversial water station mishap that hindered Farah's efforts as he was forced to run back and collect the correct drink.
Both times he lost ground on...
Still not long afterwards Farah was admitting both his satisfaction and intention to go faster, in no way doubting the marathon would be his flawless distance come Tokyo 2020.
In the men's race, Olympic marathon champion Kipchoge dominated from start to finish, taking his third victory in the last four years in London.
"If I can run two hours, six minutes here in a major championship, it shows I can be competitive", said Farah, who was eighth in 2014, his only previous attempt at the distance. I got a personal best. "Different pain - cramp and heavy legs - and different training but I have really enjoyed it. Tick to the British record, I have a long way to go". I wasn't wasting energy, I just needed a drink.
Farah came home in third, finishing with 2:06:21 and breaking Steve Jones's British marathon record which has stood since 1985.
"I know what I'm capable of and I'm going to do the rest of the marathons in the autumn as well and race the guys".
In the women's contest Vivian Cheruiyot stunned compatriot Mary Keitany to pick up her maiden win in the London capital however she was unable to break Paula Radcliffe's record.
The course takes participants all the way around London, along the Thames, and then down The Mall to the finish.
Keitany and Dibaba, who were sportingly sharing drinks in the opening segment, were ahead of Radcliffe's schedule through five kilometres in 15:46 and 10 kilometres in 31:46. But Dibaba was soon reduced to a walking pace to leave Keitany with only her two male pacemakers for company.
"I feel very surprised still, it's unreal, that was incredible", De Rozario, told interviewers after the event.
British racer David Weir took first-place in the men's wheelchair race. The 38-year-old pipped Switzerland's Marcel Hug into second place, with Daniel Romanchuk of the United States third.