Hi, I'm currently in the process of changing all my switches and sockets and I'm coming across a few problems, like no earth wire for any of the light fittings. Similarly no earth for some of the upstairs plug sockets but the worst yet is the socket in the hallway (right by the fuse box). It has both new (blue,brown,yellow/green) and old (red,black) wires looped together -not a big issue I hear you say....well it is when the old wiring is live even when the fuse box is switched off!!! How do I go about making it safe???