Summary:
Flatout, the UK functional fitness race brand, will bring its race experience to Old Billingsgate Market from 25–27 September. The three-day event will feature seven race categories, including the worldwide launch of Sidekicks, a new format designed for adults and juniors competing together.

A New Chapter for Flatout in London
Old Billingsgate Market has hosted a lot over its lifetime. Fish trading for more than a century, corporate events, exhibitions, and live entertainment. This September, the historic riverside venue will add something new to that list as Flatout transforms the space into a three-day fitness race experience in the heart of London.

Taking place from 25–27 September, Flatout London will bring together participants of different fitness levels for a weekend built around movement, challenge, and achievement. Set beside Tower Bridge and surrounded by some of London's most recognisable landmarks, the event adds a distinctive setting to London's growing fitness event calendar.

Built for People Who Want a Challenge
Born from the UK functional fitness scene, Flatout was created to deliver professionally produced races that feel competitive, supportive, and accessible at the same time. The brand's approach centres on challenging participants physically while reducing many of the barriers that can make fitness events feel intimidating to newcomers.

"We create events that challenge you physically, but the environment always feels competitive, supportive, and open," said Adam Smith of Flatout. "You don't need to be an elite athlete to be here. The races are built around people who are serious about their fitness and want an experience that's worth showing up for.

London felt like the right city to bring that to, and Old Billingsgate is the kind of venue that matches the energy we build on race day."

An Iconic Setting for Race Weekend
The London event marks an important milestone for Flatout, and the venue choice reflects that. Old Billingsgate, set beside Tower Bridge and surrounded by some of the city's most recognisable landmarks, gives the athletic competition London event a backdrop that most fitness races rarely experience.

Sidekicks Launches at Flatout London
One of the major highlights of this year's event is the introduction of Sidekicks, a brand-new category making its debut in London.

Designed for one adult and one junior participant, Sidekicks focuses on teamwork, encouragement, and shared achievement. Teams move through adapted race distances together, supporting one another throughout the course before crossing the finish line side by side.

The launch reflects Flatout's wider goal of creating race experiences that welcome more people into the sport while maintaining the sense of challenge that participants expect.

Event Information
Event: Flatout London
Venue: Old Billingsgate Market, London EC3R 6DX
Dates: 25–27 September
Tickets: weareflatout.co.uk/flatout-london

Categories:
- Solo
- Elite
- NextGen
- Doubles
- Relay
- Elite
- Sidekicks

Participants can expect athlete warm-up zones, professional race-day production, spectator engagement throughout the venue, and a finish-line experience set against one of London's most recognisable skylines.

As London's newest fitness competition continues to gain attention ahead of September, Flatout London is expected to attract first-time participants, experienced competitors, and fitness enthusiasts from across the UK.

About Flatout
Flatout is a UK fitness race brand that creates professionally produced hybrid fitness events for people who want to test the training they already do. Each race combines eight 500-metre runs with eight functional workout zones in a timed format that challenges pace, strength, endurance, and resilience. Working alongside local gyms, coaches, and partners, Flatout delivers race-day experiences that feel competitive, welcoming, and energetic, whether it's your first event or your fifteenth.

Website - https://weareflatout.co.uk/