I am trying to fit an outside light. I have a two gang two way switch and a 1 gang two way switch in my lounge. I want to install the light by replacing the 2 way 1 gang switch for a 2 way 2 gang switch. The one gang two way switch is connected as follows:- there are two cables coming into the box one contains a yellow wire with a red sleeve connected to common, also a blue wire with a red sleeve connected to L1 and a small red wire connected to L2. The other cable contains a yellow wire with a red sleeve connected to L1 and a small red wire connected to L2 and a blue wire which is not connected at all. Both cables contain earths which are properly connected to the box. Can I connect the twin and earth cable from the outside light to the 2 gang 2 way switch so that one swicth is two way and the other is one way for the outside light?