Having established that the only fuse drawing with the ignition off was the lock / alarm one, today, after a few days away, the driver side lock is playing up. This could be my problem. It seems like there is a mechanical as well as an actuator problem, but both are relatively easy fixes if the internet posts and videos are to be believed. Anyhow, I am now waiting for a replacement actuator to be delivered. I had already got the trim removal tool ready for the internal fit out. I am building up the momentum to find those pesky torx heads that are buried in the unsorted area of the garage.
I am determined not to go the route of a friend, who had two or three versions of every tool because he could not remember where he put the last one. He figured it was quicker and easier to buy a new one in off the internet. The more he replaced, the harder it got to find the one he was looking for.
His wife made a fortune on ebay when he passed away.