Daniel Cheeseman romped home to win the Bushy Park parkrun as it marked its eighth anniversary on Saturday.
The 19-year-old St Mary's University student clocked 15 minutes, 57 seconds to secure back-to-back parkrun wins.
Stragglers Running Club's Justin West came in second 34 seconds behind the winner, while Darren Tanner finished a further 11 seconds back.
The first female finisher was Lisa Harris who stopped the clock at 19:29 on her Bushy Park parkrun debut having made 17 parkrun appearances at other courses.
The first Bushy Park parkrun 5km race, founded by Ranelagh Harriers athlete Paul Sinton-Hewitt, featured 13 athletes and took place on October 2, 2004.
The concept has since grown to include 176 such races in eight countries across the globe with more than 23,000 athletes taking part each work.
Saturday marked the Bushy Park event's eighth birthday and was officially International parkrun Day.