Thank you Thomas for that good information, and I will do further testing today. The Simboards were an issue as I then deleted the whole Simboard program and re-installed it. The flights were ok then, and I did 5 straight ILS approaches perfectly and the sixth one did not lock onto the Glide Slope properly, so will need to look into why that happened.
It is so time consuming to find where the problems arise, but we have to find the answers by sheer hard work, regardless !!
I will post any further findings as I go.
Cheers...............Brian W.