Hi Ban-All-Sheds
Thanks for the reply...
Here is what I have at each switch
Dimmer in Lounge = 1 Red and 1 Yellow and 1 Blue
Double Switch in Lounge - 2 Red, 2 Yellow, 2 Blue
Upstair single switch - 1 Red, 1 Yellow, 1 Blue
Have looked at the diagram but can;t make any sense of...