Yes, I had used drop shadows in a few instances – these worked fine in CS6.
I tried removing the drop shadows and it made no difference, but I have left them off in respect of your comment that there was a definite issue - thank you very much.
Gladly, I have discovered the problem.
It is a font – one of my favourite fonts too – Impact Regular.
I have removed said font and all is now working fine.
What I have noticed about CC is that it doesn’t appear to work as fast as CS6 – maybe that’s just me looking for faults.
A million thanks for your interest in my problem – I had spent around 6 hours on the lines to India, who could not solve it.
I have to say I find Adobe extremely UNHELPFUL and getting hold of someone really knowledgeable in a real crisis is an impossibility!!!