Sawe, who is the reigning world half marathon champion, won the race in two hours, 02 minutes and 27 seconds.
Defending champion Alexander Mutiso edged out Abdi Nageeye from the Netherlands to claim third place.
Kenya’s Sabastian Sawe took charge of the race with 12 kilometres to go to win the 2025 London Marathon in the second fastest time this season on Sunday in the British capital city.
Running only his second marathon race after winning in Valencia in December, Sawe, who is the reigning world half marathon champion, won the race in two hours, 02 minutes and 27 seconds.
