Hall and Kay Fire Services Limited trading as Hall & Kay Fire Engineering (Ascot) holds LPCB approval in the RedBook as a certificated gas extinguishing system firm and a certified fire detection and alarm system firm and an approved sprinkler contractor for the UK and Ireland, certificates ASC-071, CFA-147, CFSI-009. Its LPS 1204 scope reads: “Certificated to design, install, commission and service Non-liquefied inert gases and Liquefied halocarbon gases and issue LPCB Certificates of Conformity for these systems.” Holding more than one LPCB firm scheme is uncommon — only a minority of the 239 UK holders do.