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2 January 2017, 14:12
Hi Niall et al
I did ring customer services as suggested and they recommended that I reset network settings in my iphone 6s by doing this........
Settings > General > Reset > Reset Network Settings. The phone shut down and rebooted after a short while.
I had earlier reset my satnav (if that is of any significance)
I then had to reconnect my iphone that worked this time and a connection was established and then reactivated mydrive.
All appears to be well and it is working to my great relief.
I was helped by customer services representatives who were both excellent and thanks indeed to Niall for recommended that I made a call to them.
Fingers crossed that this issue does not return.