Meet John Kendall...
As one of only three active GUE technical instructors and the only GUE cave instructor based in the UK, John Kendall has a passion for introducing his students to the world of technical and cave diving. Whether you're looking to 'go tech' or you're a recreational diver who simply wants to improve your skills, control and confidence, John is perfectly placed to help divers of all levels of experience and ability to achieve their diving ambitions.

John Kendall is one of only three GUE technical instructors and the only GUE cave instructor based in the UK. John travels the world teaching a range of GUE recreational, technical and cave classes.

John first became involved with GUE in 2003 after taking part in one of the very first GUE courses to be run in the UK. Putting his GUE training into practice as an active member of the DIR-UK exploration team, John joined the ranks of the GUE elite by becoming a GUE Fundamentals instructor in 2006 and since then he progressed to teach almost all GUE classes across the Technical, Cave and CCR curricula.

John has been involved in writing and developing classes for GUE, He was the lead author on the Gas Blender and Photogrammetry classes, and was part of the writing team behind the 2021 release of the GUE Fundamentals of Better Diving book. He sits on the GUE Training Council.

John teaches classes around the world, as well as arranging experience trips for anyone interested in GUE diving.

As an Instructor Trainer for GUE, John is tasked with developing and teaching instructor candidates how to be effective and successful GUE instructors. He is pioneering the use of online resources for instructor development, as well as helping create streamlined routes for experienced recreational instructors to learn about GUE.

As well as being a passionate advocate of GUE, John is also an active dive explorer in his own right. When he's not teaching, John can be found exploring some of the world's most exciting dive destinations - from the phreatic cave systems of France, Florida and Mexico to flooded mines in Finland and the deep wrecks that lie off the coast of the UK, Malta and Sweden. John loves nothing more than sharing his adventures with others - particularly non-divers – especially through the use of 3D photogrammetry.

Since first learning to dive in 1993, John has travelled around the world diving and teaching. As an active technical and cave diver, he has been involved in a number of high profile diving projects - from support diving with the WKPP on their record breaking cave traverse to archaeological diving in the Mediterranean, Baltic Sea and English Channel. He is also a Fellow of The Explorers Club of New York.

Diving Qualifications:

  • GUE Cave 1 Instructor
  • GUE Cave 2 Instructor
  • GUE Tech 1 Instructor
  • GUE Tech 2 Instructor
  • GUE CCR-1 Instructor
  • GUE CCR-2 Instructor
  • GUE Fundamentals Instructor + Instuctor Trainer
  • GUE Rec 1, 2 & 3 Instructor + Instuctor Trainer
  • GUE Photogrammetry Instructor + Instructor Evaluator
  • GUE Gas Blender Instructor + Instuctor Evaluator
  • GUE DPV Instructor
  • GUE Documentation Diver Instructor
  • GUE Tech 2+ Diver
  • GUE Cave 2 Diver
  • GUE RB80 Rebreather Diver
  • GUE JJ-CCR Rebreather Diver
  • Advanced Diver BSAC
  • Open Water Instructor BSAC
  • Trimix TDI
Diving Experience:

  • Diving since 1993
  • 3000+ dives
  • 1000+ wreck dives
  • 1100+ Trimix dives
  • 700+ Cave dives
Community Involvement:

  • Member of GUE-UK
  • Project Diver - WKPP
  • Survey Diver on St George Survey Project, Monvalent, France
  • Project manager for Project Baseline Malta
  • Project Diver - Project Baseline Mediteranian Panarea III
  • Project Diver/Photographer - Mars the Magnificant
  • Project Diver/Photographer - Project Baseline Sardinia Caves
  • Founding member of the TEKCamp instructor team
  • Fellow of The Explorers Club


Interested in GUE training? You can contact John by phone...

+44 (0)7798 523110

Alternatively, by email...

Student testimonials...
"Having been diving for two decades, teaching both recreational and technical diving for half of that time, you will appreciate that I have been involved with a significant number of instructors over the years.

I can say, without hesitation, that John is the finest diving educator that I have had the pleasure of interacting with as a student. He is a credit to GUE and I look forward to recommending his classes to others in the future."
Mark S
"Just a quick note to say thank you for your hard work training me in Porthkerris, and helping me get through my first 'for fun' dives in Plymouth.

Despite having some wobbly moments, your support and confident training really helped me enjoy what I was doing - by the end of the week I found myself thinking less about the diving, and more about looking at the fantastic things around me in the water.

Hopefully this marks a great start to a long and enjoyable future of diving for me!"
"I can only recommend John Kendall at the highest level. He is a top notch instructor that always aims for student progress and success. In regards to the course itself, it was the best I ever had.

In summary the top quality program and standards of the course allied with John's teaching makes my overall assessment of this course the highest quality course I've ever attended.

I will recommend GUE and John Kendall as an instructor to all my fellow divers."
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Further Information...
GUE Instructor Training with John Kendall