Good morning, I have seen variations on this thread in the forum already, but was after advise for my specific question before I proceed. My bathroom currently has a pullcord switch and a single light in a safe zone, which is on the same curcuit as other lights on this floor. I want to change the single light to three mains downligths, one of which will be more or less above the shower cubicle (something like the lights in the link below) http://www.screwfix.com/p/halolite-...e-240v-mains-voltage-bathroom-downlight/48434 I intend to put a spur in near where the existing light fitting (which is accessible from the loft), and wire the three of these into it, and fill the old hole. The wiring circuit appears to be ring format, with the live feed coming from the previous ceiling rose in the bedroom. The question is, do I need to add a RCD between the live feed coming from the bedroom rose and the new spur which the three downlights are going into. Many thanks for any advice.