Paul began his training diving career in 1996 and is now at the forefront of technical diver training with DiveRAID - the Rebreather Association of International Divers. He has dived caves and wrecks all over the world and has safely planned and executed ocean dives to a maximum depth of 150 metres. Paul regularly contributes to the dive press and has worked with film and TV companies as a diver, supplier and advisor. He has given many diving related presentations at leading conferences including LIDS, Eurotek and DEMA.

Martin is one of the UK and world's most experienced instructors and teachs courses from IANTD, PADI and both NACD & NSS-CDS. Martin is the International Training Director for NACD, sits on the Board of Advisors for IANTD and is also a Technical Field Consultant for PADI's range of rebreather programs. Martin specialises in extreme environments and regularly teaches courses such as expedition trimix, ice diving, advanced cave and technical wreck to instructor level in environments from the arctic to the equator.

Beatrice started diving at the age of 16 and is now an open circuit and CCR technical instructor. She holds a Masters Degree in Marine Biology and Oceanography and co-author of the book Biodiving: Environments and Organisms in the Mediterranean. She travels the world diving and teaching in different environments, sharing her experiences through educational projects and dive shows. She is actively involved in a number of projects to study of the biological colonisation in a new cave system and also the exploration of a recently discovered deep wreck.

Mark has been diving since 1987 and has been teaching since 1994. He has been a full time technical diving instructor since 2004. He is a contributor to Sport Diver Magazine in which he writes a regular column on technical diving. In 2008 Mark published Deco for Divers, a widely acclaimed overview of the theory and physiology of decompression. This has quickly become the standard text on the subject and is recommended reading by a number of the technical diving agencies.

Garry, aka 'Sidemount Bob', began his diving career in 1999. His interest in diving includes sidemount, backmount and ccr and has led to an extensive knowledge base which he eagerly shares with others. An avid dry caver in his earlier days, Garry's passion for sidemount and cave diving, led him to be fundamental in the founding of the Apeks Cave Exploration Project in 2013. Whether diving technical or recreational, cave or wreck, Garry provides high quality training with an enthusiastic and friendly approach.

Adam started diving in 1995 aged 12 and knew instantly he was born to teach people to dive. Adam now runs one of the UK's largest certifying dive centres and is one of a select group of SSI Recreational, Technical and CCR Instructor Trainers. In his role as SSI TXR International Training Director, Adam is a contributing editor to the new XR and TXR Technical training materials for SSI. Undoubtedly Adam's passion is teaching - passing on knowledge & skills in technical, sidemount and closed circuit rebreathers, both at user and instructor level.

Kieran Hatton has been diving since 1996 when he was just 14 years old. At 16, prior to visiting Scapa Flow for the first time, he took his first Tec Course and from then he has never looked back. Currently based in Plymouth, Kieran teaches both open circuit and rebreather nitrox/trimix. Kieran is well regarded amongst the diving industry for his knowledge, for his practicality and for his passion for thorough course training with each and every student from the start.

Ian started his teaching career in 2005, teaching open circuit technical courses up to Advanced Trimix. Now specialising in Mine, Cave and Trimix diving as an Advanced Cave diving instructor, Ian believes that the wrecks, caves and unexplored areas of the world are accessible to all divers with the correct training, equipment and knowledge. When not teaching, Ian spends his time exploring caves and flooded mines. He offers training here in the UK, Azores, France, Spain, Malta and Mexico.

Rich Walker started diving in 1991 and soon found himself spending all his spare time exploring the shipwrecks off the coast of the UK. Rich is a member of the GUE board of advisors and is able to teach all GUE recreational and technical classes up to Tech 2 and CCR. He is also an instructor evaluator at all recreational levels and to the Tech 2 level. Wreck diving has always been his passion. He runs Project Tiger in the UK, documenting two WW2 LSTs in the Channel. He has dived on Ghost Fishing projects in Croatia and Scapa Flow. In July 2015 Rich was part of the team diving the Mars in the Baltic Sea. Rich is also a keen cave diver and enjoys exploring caves both here in the UK and abroad.

John Kendall has been diving since 1993 and is a GUE Technical and Cave Instructor and an Instructor Trainer. John has worked on exploration projects around the world, including the Woodville Karst Plains Project (WKPP), the Mexico Cave Exploration Project, and recently has been working on deep water 3D photomapping of 2300 year old shipwrecks off the coast of Sicily, in association with the Soperindenza del Mare.