About Us
Our History
The companies formation closely followed the introduction of new “Compressed Air” Regulations in 1996 which helped to define its operational standards and continuing development and since that time, the company has supported the further development of hyperbaric tunnelling standards both within the UK and Internationally.
From around 2010, changes in tunnelling technology and methodology started to change the format and scope of the support services required to keep the business viable and as a result of this the company began to diversify into supporting tunnelling safety and health whilst retaining its core specialist hyperbaric expertise.
This diversification is continuing with the company now offering a formalised range of additional Tunnelling and TBM supports alongside or standalone from its core hyperbaric packages.
Meet the core team
At Tony Ridley Hyperbaric Associates Limited, we have a highly experienced and dedicated team, ready to help you.

Ryan Hogg
Operations Director

Tony Ridley
Managing Director

Alex Buckenham
Accounts Director

Andrew Colvin
Company Doctor Occupational Health Physician / Contract Medical Advisor / Appointed Doctor

Dr John Colvin
Occupational Health Physician / Appointed Doctor

Natalie Stephenson
Project Lead / MLA / Health Technician

Martin Fergusson
Project MLA / Health Technician

Tom Hammond
Training Manager & Lead Instructor

Tom Garratt
Project MLA / Health Technician

Mal Thomson
Project Lead / MLA / Health Technician

Jason Hutchison
Project Lead / MLA / Health Technician

Connor Brooks
Project MLA / Health Technician
Outside of work, TRHA has a keen interest in all sport and the benefits it can bring. In line with this, TRHA supports and sponsors North Walsham Vikings Rugby Club
Our Projects
Take a look at a few of the projects we’ve worked on over the past year.
Specialist Tunnelling Services
Our team are passionate about delivering the best possible outcome for our clients and we use our expertise to make sure that your tunnelling requirements are met in a safe, cost-effective and timely manner. We strive to be a total service provider offering specialist solutions from design through execution and implementation to ongoing maintenance. Other specialist services we provide include project design, occupational safety and health services, pre-tender & tender advice, free air intervention, refuge chamber supports & TBM training. We have clients UK and worldwide, so get in touch today to find out how we can help run your tunnelling project. Other services include: advice on airlock system design, assistance to attain high pressure exemption or approval, legislative advice based on need & best practice, construction under compressed air, training of client personnel, audit, appraisal & commissioning of TBM airlock systems, emergency, rescue & extrication systems & environmental control & client liaison.
