We've added single gang back boxes to the site in the form of a metal flush mount box & plastic dry lining box. The metal box is sunk into the plaster/wall and fixed with screws. The dry lining box is designed for plaster board cavity installations.

Metal Back Box
http://www.run-it-direct.co.uk/flushmetalbackbox.html

Dry Lining Box
http://www.run-it-direct.co.uk/dryliningbackbox.html

These are in addition to the surface mount back box that we previously offered. These are suitable for all single gang applications so fully compatible with our Euro faceplates. A question we get asked quite a lot is whether an NTE5 master socket can be mounted to single gang back boxes, the answer is YES! The NTE5 is single gang sized(& comes with a single gang surface mount back box as standard!).

What is "single gang"? Look at any modern light switch or single 3 pin mains socket!