Bit of an update...
The door open warning and interior lights have worked intermittently from the drivers door, and I've managed to reprogramme they key :-D
The door open and interior lights still dont work most of the time from the drivers door, and have never worked from the other doors. While I can live with this, there is a risk of the car locking itself, so I'd like to get it sorted. Is my problem most likely to be with the door switches or a body control module?
Cheers