Success! - And all due to a no thread - Electric Hood Microswitch
Well, all i can say is a 'Big Thank You' - You hit the nail on the head though in this case the threaded bolt!
Having spent a year with a roof that had become manual, it is now operating as it should be. What threw me was that one side of the rear pins (Drivers side) had a nut and the other side hasn't. looking further into this, these are self tightening threaded bolt/pins which don't really need a nut!
Sure as anything the bolt on the passengers side was not showing any thread, hence this was not catching the micro switch leaving the ECU in a state of not knowing whether the roof was closed or not!
In the process of fixing this i also renewed the hydraulic fluid with what i understand is the correct specification - ISO VG 22 - So now the roof is closing sweet!
Happy Driving once again! Whoa!