Fundamentals first
Dedicated fundamentals classes every week cover the positions, escapes and submissions everything else is built on. No experience needed, and nobody is thrown in at the deep end.
Brazilian Jiu-Jitsu · Thai Boxing · Horsham
Empower Through Brazilian Jiu-Jitsu
Brazilian Jiu-Jitsu for adults and kids in Horsham, West Sussex: gi and no-gi classes, beginner-friendly fundamentals and a competition team, now with Thai boxing, yin yoga and a treatment room under the same roof.
- 26classes every week
- 3open mats a week
- 7coaches on the team
- 7days a week on the mat
On the mat
Where the work gets done
The SWBJJ team 
Technique first, then live rounds 
Seminar day 
The new mat 
The café, looking onto the mat
Why train here
Serious jiu-jitsu, a friendly room
Whether you want to compete, get fit or simply learn to look after yourself, the structure is the same: clear fundamentals, good training partners and coaches who know your name.
A proper kids’ programme
Up to age 15, grouped by age and experience, with a kids’ belt system and clear expectations on effort, respect and looking after each other.
A clear lineage
Head coach Sonny Weston is a black belt under Keith McKenzie, in the line of Ricardo and Leo Vieira. SWBJJ is independent: one curriculum, one grading standard, set here in Horsham, with a club team on Smoothcomp when you’re ready to test yourself.
Book from your phone
Members book, cancel and join waitlists in the SWBJJ app, check in on arrival and see their belt, stripes and mat hours build up over time.
Safeguarding built in
Waivers, parental consent and photo permissions are all handled digitally, and there is a named welfare officer to speak to in confidence about any concern.
Open mats every week
3 open mats a week to put it all together: roll, drill, ask questions and get to know the people you’ll be training with for years.
New at the academy
More than jiu-jitsu
The mat is still the heart of it. Around it, the academy has grown into a place to fight, stretch, recover and refuel.
- First month freeThai BoxingMuay Thai with George Jarvis and Paulo Da Silva of Lumpini Crawley. Your first month of Thai boxing is free.Find out more
- ThursdaysYin YogaAn hour of slow, deep stretching with Lydia, 7:30 to 8:30pm.Find out more
- RecoveryTreatment roomSports massage at the academy, booked at the desk.Find out more
- ShopSupplements & kitInner Vitality supplements and club clothing at the counter and in the app.Find out more
Programmes
Something for everyone on the mat
Every class on the timetable belongs to one of these programmes. Pick the one that fits and we’ll point you at the right first session.
Adults
AdultsGi and no-gi classes for complete beginners through to competitors. Fundamentals classes teach the core positions, escapes and submissions; the main classes build on them with live training, and the no-gi sessions cover the wrestling and submission grappling that carry straight into MMA.
- Adults Gi
- Adults Gi Fundamentals
- Adults No-Gi
- No-Gi Fundamentals
- No-Gi White Belts Only
Kids
KidsSmall, age-grouped classes that build confidence, discipline and real self-defence skills. Children earn stripes and belts on their own kids’ belt system, and parents can follow their progress in the app.
- Kids Gi
- Kids Gi Fundamentals
- Kids No-Gi
- Kids White Belts (Gi)
Mini Vikings
Mini VikingsMini Vikings is jiu-jitsu for four to eight year olds: games, movement and the first positions, taught in short, lively sessions. Pay per class, so there is no commitment while they find their feet.
- Mini Vikings (4–8)
- Mini Vikings Advanced (4–8)
Open mat
Open matUnstructured mat time to put the week’s techniques together. Roll, drill or ask a coach a question: open mats are where the pieces click.
- Open Mat
Thai Boxing
Thai BoxingHorsham Muay Thai: pads, clinch, technique and conditioning for beginners and fighters alike.
- Thai Boxing
Yin Yoga
Yin YogaYin yoga on Thursday evenings: long, slow holds that open the hips and shoulders and undo a week on the mat.
- Yin Yoga
Reviews
What members and parents say
Great jiu-jitsu gym! I’ve been training here for almost a year and have already learned so much. The coaches are very experienced and the atmosphere is super friendly and welcoming. It’s especially great for women. There are women only classes to help build confidence when starting out. I’ve really been enjoying my time here and this gym is definitely the reason I caught the BJJ bug. Highly recommend! 💪
Completely new to BJJ and in my 50’s. Was initially nervous about starting but needn’t have worries, Sonny and his coaching staff have made me feel really welcome as have the other members. The atmosphere around the club is unique and I’m proud to be part of this community, couldn’t recommend highly enough
I have been a member of this club for over a year now and I just wish I had found it sooner. I am 34 years old and have never felt more welcome in any sport or community. Learning something so complex, humbling and physically commanding is never going to become boring for someone with an active mind and I couldn't recommend Jiu jitsu more. The fitness side of it is just a bonus. SWBJJ is 5* for me 💫
Amazing club, super friendly coaches and students. Great place to start for beginners as they offer white belt only classes through the week. Also great place for more experienced people as there’s a good amount of higher belts to work with and also learn from. Highly recommend for anyone that wants to get started on their journey🙌
Sonny has done an amazing job creating a club where everyone feels welcome. I was a bit hesitant at first because of the reputation some martial arts clubs have, but they have really gone the extra mile to make sure everyone has a good time and feels safe.
Sonny and the other coaches are super friendly and welcoming. The techniques that they teach are on another level. The vibe and atmosphere in the club is always positive and great to be around. I'm so happy to have found this hidden gem and call it my gym!
The trophy room
1,266 competition medals and counting
Kids and adults, gi and no-gi, from Sussex opens to the Junior World Championships. Every result the team has recorded on Smoothcomp, in one place.
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Coaches
Who you’ll be learning from
George Jarvis
Lumpini Crawley
George “G-Unit” Jarvis is a Crawley-born professional Muay Thai fighter who competes in ONE Championship. He started at four in his father John Jarvis’s Lumpini gym and has won WBC Muaythai English, European, International and World titles and the ISKA world title at super middleweight.
In ONE he has beaten Rungrawee Sitsongpeenong (twice, both by knockout), Sinsamut Klinmee and Mouhcine Chafi in main events at Bangkok’s Lumpinee Stadium, and has twice challenged Regian Eersel for the ONE lightweight Muay Thai world title. He brings the Lumpini system that produced him to Thai boxing at SWBJJ.
Paulo Da Silva
Lumpini Crawley
Paulo Da Silva is a Lumpini Crawley coach and co-owner, the head coach and cornerman behind George Jarvis’s world title runs, and co-promoter of the Muay Thai Mayhem shows at Crawley’s K2.
Portuguese-born and raised in the UK, he fought at bantamweight across the USA, China, Japan and Europe from 1999 to 2025, winning his final bout by first-round knockout at 44. He leads Thai boxing at SWBJJ.
Lydia
Lydia teaches yin yoga at the academy on Thursday evenings: an hour of long, slow holds that open the hips and shoulders and undo a week on the mat. Open to members and non-members.
Membership
Memberships from £25 a month
No joining fee is hidden in the small print: the prices on the pricing page are the prices Sonny sets, paid monthly by Direct Debit, and you manage your membership yourself in the app. Mini Vikings pay per class at the desk.
The app
Your jiu-jitsu, in your pocket
Everything members need lives in the SWBJJ app, built for this academy rather than borrowed from a template.
- Book, cancel and join the waitlist in two taps
- Check in when you arrive and watch your mat hours add up
- Your belt, stripes and grading history in one place
- What was covered in class, with technique videos to revise
- One parent login for every child who trains
On Instagram
Life on the mat, as it happens
Visit
Find us in Horsham
Unit T, Blatchford Road, Horsham RH13 5QR
Brazilian Jiu-Jitsu in West Sussex, easy to reach from Crawley, Horley, Haywards Heath, Billingshurst, Southwater, Broadbridge Heath, Rudgwick, Cowfold and Dorking.