Richard, what the Health and Safety(Safety Signs & Signals) Regualtions 1996 actually say is that red is the identifying colour for all fire fighting equipment. If the equipment itself is red, this will satisfy the regulations. Where the equipment is not red, then highlighting the position of the firefighting equipment by colouring the background behind the equipment red may be enough to comply. The point here is the Regulations recognise the equipment may not be red. Probably the Regs. anticipated manufacturers not producing red equipment, and were never written to 'allow' end users to decide their colour preference, but, despite what BAFE say the Regs allow a variance in colour. Or are BAFE suggesting that stainless steel extinguishers are breaching the Regs? However, your comment "we must advise stongly he replaces them" is fuly accepted, but, the point of the discussion is what do we do, as competent assessors, if the RP does his own thing despite our good advice?