Eliud Kipchoge of Kenya crosses the finish line to win the men's category race in the Tokyo Marathon 2021 in Tokyo, Japan March 6, 2022.
Kipchoge, a four-times winner in London, clocked two hours, 01.09 seconds to take half a minute off his own record set on the same Berlin course four years ago.
Returning to London he will present medals to thousands of youngsters racing parts of the course on Saturday, finishing under the famous gantry on The Mall.
Briton Mo Farah, now 39, won the Mini Marathon three times and will be the man the locals want to see on Sunday.
Brasher said that he was planning for London Marathon to accommodate 50,000 runners, up from the current total of around 40,000, probably from 2024, with a long view to matching that with 50,000 in the Mini Marathon to mark the race's 50th Anniversary in 2031.