Official website : terrafix.co.uk
Address : Terrafix Limited, Bladon House, Festival Way, Stoke-on-Trent Staffordshire, United Kingdom, ST1 5SH
Phone : (+44) 1782 577015
Fax : (+44) 1782 835667
Email : enquiries@terrafix.co.uk

Legal status : British company founded in 1983.
Clients : Law enforcement agencies. According to the events page of their website, they market products aimed at “police, law enforcement and security professionals”.
Products : Audio and tracking surveillance systems. The products page on their website lists some of their tracking surveillance devices, including technical specifications and pictures.

Two undated catalogs are also available, here and here. They list the products marketed by Terrafix, including covert audio and tracking surveillance systems.