OK, I've been inspired to try and bring this thread up to date, so ...
The door light never worked when I opened the drivers door, and the warning module always shows it as open. So first place I went to was the switch for door open/close at the door frame and sure enough ...
it had been disconnected and out it fell!
For some reason the power wire for it (brown/red) had been 'robbed' for something else ... I'm thinking alarm system but its all messy and a bit wierd (?) ... see the red/brown has been cut and sent out as black aftermarket for something else ...
So out came my gear ...
and I reinstalled the switch back to the original harness' red/brown power ...
Good news is my cabin light works

...
... but the warning module still doesn't 'see' the door

.
I have since been informed that I need to go inside the door, and sort the micro switch at the latch, still yet to be done.