It’s not just the professional races at T100 London that are rammed full of star names – it’s the same in the age-group ranks.
Celebrity chef Gordon Ramsay and his wife Tana will join almost 6,000 amateur athletes across the weekend, by taking on an Olympic distance triathlon (1.5km swim, 40km bike, 10km run) to raise awareness and funds for Great Ormond Street Hospital – via their JustGiving page – and celebrate ten years as patrons for the charity.
They will be joined by daughter Tilly, taking on her first triathlon, and future son-in-law and Olympic swimming champion Adam Peaty.

Judd back for more
And McFly drummer Harry Judd returns for a crack at the Olympic distance.
“I can’t wait to be back at the T100 this weekend,” said Judd.
“Last year was my first triathlon and I did the sprint distance so this year I’m trying out the Olympic. It’s such an amazing event.”
And Judd is no stranger to racing on the streets of the capital having clocked at impressive time of 3:15 in hot conditions at this year’s London Marathon.
Also there is former racing driver Billy Monger, who broke the Ironman world record for a double amputee at the World Championships in Kona 2024.
He has ambitions of making it to the Paralympics in Los Angeles in 2028 and will line up in the Sprint distance event (750m swim, 20km bike, 5km run).

Amplifying diversity
2025 is the summer of women’s sport – and the London T100 is no exception.
Women in Tri acts as a gateway for women of all backgrounds to experience the beneficial mental and physical impacts of swim-bike-run.
“I fell in love with triathlon with my first in 2018; I didn’t know how to swim or bike, but I was intrigued about taking part in this sport,” explains Chair and CEO Bianca Fernandez-Clark. “However, I also noticed the lack of diversity. It was lonely being a beginner, even lonelier being a black woman.”
At their inaugural 2024 London T100, the PTO introduced women’s-only modesty changing areas within transition between swim and bike, to encourage participants from multi-diverse backgrounds into the sport.
This year, larger swim caps are available, to accommodate thicker, curlier hair, such as dreadlocks, weaves and braids.
There are also 45 places on the start line for Women in Tri first timers, a designated Women in Tri start wave, cheer zone and exhibition space. All to amplify the diverse impact on the course and around the venue.