B
Ben I can’t really say whether the smart touch switch works, as it is impossible to fit it to a standard UK electrical box. Instead of having through screw holes, it has keyhole slots that are intended to push over the electrical screw heads and lock into place. I am very sceptical that it would ever be possible to securely mount it using this technique, but I will never know because the holes are too small to fit over the standard 3.5mm screw heads. The switch is supplied with its own mounting screws, but the heads are also too big, and worse the screws are bigger than 3.5mm and can’t screw into the box screw holes.