RIght this post is really old but I can throw some light on this. Regalsafe where made by JSB electrical and are based in Holmes Chapel, Cheshire. JSB made the Regalsafe RS brand of panels and one called the Regent, an 8 zone panel. The RS type I believe where sponsored by RS components at the time because they did sell them too. If anyone remembers the RS panels then they will remember the special RS components, system zero driver that was required (RS code 444 - 7908). These panels used the system zero security screws also from RS components (526-653). I actually put an RS50F into my own house and it worked for a number of years then just died. With me always being a fan of scanny I replaced it with an old 9100 I had lying around. As Previously mentioned in this post (albeit 9 years ago lol), everyone came under the Cooper umbrella now Eaton but JSB stopped making security panels and concentrated on their emergency lighting and fire alarm equipment and still under the Eaton umbrella.