K12 rear light and boot light stuck on

[pellow]

I have an unusual fault in that the rear fog light and the boot light remains lit all the time. It has been raining hard for days and I probably have water somewhere. I can't locate the boot light switch. Is it in the catch somewhere inside the tailgate? Does anyone have the wiring diagram for this section?
Any help would be gratefully received.

 

[pellow]

Now it's finally stopped raining I've managed to have a quick look. Can't see any water anywhere, everywhere is bone dry. Still can't find the tailgate switch for the boot light. I'm wondering if I have two separate faults. I can't find a relay for the fog light which I thought may have got stuck.

 

[pellow]

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