Hi dannyboi,
There is a separate fuse for upstairs and downstairs lights - these arent labelled as such, there are just two labelled as 'lights' but having flipped them it looks like they split upstairs and downstairs as they should.
Certainly in the case of the problematic light switch the 'upstairs lights' fuse kills power to what I labelled as 'Gang 1' on the original picture i attached.
And the 'downstairs light' fuse kills power to what I labelled as 'Gang 2 & 3'.
Clear as mud?!
There is a separate fuse for upstairs and downstairs lights - these arent labelled as such, there are just two labelled as 'lights' but having flipped them it looks like they split upstairs and downstairs as they should.
Certainly in the case of the problematic light switch the 'upstairs lights' fuse kills power to what I labelled as 'Gang 1' on the original picture i attached.
And the 'downstairs light' fuse kills power to what I labelled as 'Gang 2 & 3'.
Clear as mud?!