The starter motor would not turn over when the ignition was turned on. Switched off and checked connections to battery, which were okay. Turned on the ignition again - this time no ignition electrics at all. Non-ignition electrics (head lights, side lights, interior light, seats etc.) work okay. Battery and all the fuses still checked out okay. It sounds as though it may be an electrical fault, probably linked to the autogearbox start inhibitor. Anyone experienced this problem or know what the problem may be ? Cheers

Check the main fuse (rear of drivers side front strut tower in a black box). Does the car have an imobiliser?

I've checked all the fuses, including the main fuse (brown link ??). Car does have an immobiliser which I thought might be the problem, so I also disconnected it. Can't understand why there are no ignition circuit electrics at all.

Remove the cover under the steering wheel and check you're getting 12v to the ign switch. Then check you're getting 12v on the outputs when you turn the switch... You probably already tried this though looking at what you've done already...