STRENGTH IN NUMBERS
POWER IN COMMUNITY
CrossFit TwentyThree was born from a passion for fitness and a commitment to fostering a supportive community. Our mission is to inspire and empower individuals to lead healthier, fitter lives by sharing our love for exercise and creating an environment where everyone feels welcome and motivated to achieve their best.
CROSSFIT TWENTYTHREE
IS EXPANDING!
We are moving next door into a brand new 5,500sqft facility at 74 Malham Road, opening January 2026. With more space, more classes, dedicated luxury changing facilities, and more opportunities to improve your health and fitness. This is the next chapter for our community.
Secure your VIP space now!. Membership prices for the new facility can be found below and the timetable will be released closer to the time. Watch this space for more announcements.
Bigger home. Same community. Even more to come.
About your coaches
Alex Watson
Co-Owner & Coach
Alex is a CrossFit Level 2 Coach with a background in physiotherapy and national-level hockey. With over five years of CrossFit coaching experience, he brings deep expertise in Olympic weightlifting, gymnastics, and injury-aware training to help members move better, train smarter, and perform at their best.
George Bretherton
Co-Owner & Coach
George is a CrossFit Level 2 Coach with a naturally competitive edge and years of experience in the fitness industry across the UK and abroad. Since discovering CrossFit in 2021 and becoming a coach in 2022, he’s coached thousands of classes and brings expertise in Olympic weightlifting, gymnastics, adaptive training and Animal Flow to every session.
Ben Champion
Coach
Ben has nearly a decade of experience in the fitness industry, including three years as a CrossFit coach. After discovering CrossFit through his own training, he became passionate about its mix of performance and community. He now coaches with a strong focus on helping every member progress; whether that’s their first bar muscle-up or simply moving better than yesterday.
Max Thompson
Coach
Max has been in the fitness industry since 2018 and brings a wide-ranging coaching background that includes youth development, mentoring new trainers, and school-based fitness programmes. After discovering CrossFit in 2024, he found a home in its constant challenge and variety, with strengths in Olympic weightlifting, mobility and injury-aware training.
Sophie Moise
Coach
Sophie is a CrossFit Coach with a lifelong love of sport and a background in group fitness. After qualifying as a Personal Trainer in 2018 and working across spin, F45 and Third Space, she found her home in CrossFit; a place where her all-rounder skillset truly shines. She now coaches to help others build confidence, strength and a love for training.
14 DAY INTRO TO
CROSSFIT @ CF23
At CrossFit TwentyThree, we believe in giving new members a comprehensive experience right from the start, which is why we don’t offer free trials or foundations courses. Instead, we provide a 14-day unlimited trial. This trial period offers a thorough introduction to CrossFit, allowing you to fully immerse yourself in the varied and dynamic workouts that define our program. Therefore you’ll experience firsthand the diverse and constantly varied nature of CrossFit, making it the best way to sample everything we have to offer.
Community Reviews
Read what our members have to say
"I love CrossFit TwentyThree because the coaches are AMAZING and incredible professionals, they tailor every session to individual's needs, they care deeply about member's experiences and fostering a community and take the time to organise a range of socials."
LEILA W
"CrossFit23 is fantastic! The community they have built is fantastic and the quality of their coaching is top notch. I’ve tried various group fitness environments over the years and can hand on heart say this is the best I’ve been to."
SANJAY S
"By far the best fitness decision that I have made and has quickly become very addictive! I couldn’t recommend it more highly to people considering joining."
NILS L
"Best CrossFit gym I’ve been to - the coaches are super knowledgeable, supportive, and diligent about proper form and safety. The focus on community means the gym has a kind atmosphere that motivates people to do their best."
EMILY M
"There is such a friendly and supportive atmosphere in every class, with everyone celebrating each other's achievements."
KATRINA T
"CrossFit TwentyThree is building such a great community in Forest Hill (both inside and outside of the gym), and I cannot recommend them highly enough!!"
HYUN WOO K
"A really welcoming gym. Sense of community is extremely strong. All workouts are scaled for your fitness level and the coaches are great with encouraging you to do your best! Fun socials too - couldn't recommend it more!"
PHOEBE S
"Whether you’re training to get quicker, lift more or get fitter, this place has it all. They really are at the top of the game and the community that comes with it, is a very added and welcome bonus."
KARL C
"The coaching is first class, and they bring their knowledge, their enthusiasm and energy to every session."
JOSH J
"CrossFit 23 is an incredible home to its talented coaches and wonderful community. The coaches continuously push you to what they know you can achieve (which is more than what you think you are capable of)."
BIDDY K
Pricing
BASE
£140 per month
- 2 classes per week, billed monthly
- Access to all class types
- Exclusive admission to in-house events
- 30 day cancellation notice
- The Workshop (Open Gym) bolt on available +£30
CORE
£175 per month
- 13 classes per month
- Access to all class types
- Exclusive admission to in-house events
- 30 day cancellation notice
- The Workshop (Open Gym) bolt on available +£30
UNLTD
£195 per month
- Unlimited class and session bookings per month
- Access to all class types
- Exclusive admission to in-house events
- 30 day cancellation notice
- The Workshop (Open Gym) access included
Need more flexibility?
We offer 10 class packs with a 3 month expiry for £155. These provide the perfect balance of convenience and commitment, allowing you to attend classes on your schedule. Click the link below to join the Waiting List.
Find out more
Just Want to Take Part in Hyrox?
HYROX CORE
£89 per month
- 8 HYROX sessions per month
- Exclusive admission to in-house events
- 30 day cancellation notice
- The Workshop (Open Gym) bolt on available +£30
HYROX UNLTD
£119 per month
- Unlimited HYROX sessions per month
- Exclusive admission to in-house events
- 30 day cancellation notice
- The Workshop (Open Gym) bolt on available +£30
Open Gym Only
Just looking to join us for The Workshop? Unlimited access to our open gym is available for £45 per month.
Learn more
Ready to get started?
Ready to get started or have questions? Read our Frequently Asked Questions below!