Welcome to our new look website.

"T.R.H.A Ltd is a specialist tunnelling company established in 1997. We provide expert services related to all hyperbaric techniques associated with modern tunnelling applications, together and in parallel with related Tunnel / TBM ; Safety, Medical, Occupational Health, Rescue & Extrication
Please use the navigation panel (Left) to find your way around. Our telephone and email addresses appear at the foot of every page for your convenience.

A.R.Ridley MSc CMIOSH - Managing Director"
Tel: +44 01508 538 838 Fax: +44 01508 538 938