Thanks irneb. Crabtree Topaz offer 2 sets that I'm interested in. One is old 3 pin + 2 Slimline with 2 switches. Two is a bank 4 Slimline witched in 2's. Is it permissible to put these two side by side in a wall but from the same cable feed OR must they b supplied individually. I'll get an electrician to carry out the work.