Thanks for all the replies - now sorted.
Used 'I heart cabbages' advice here -
http://i-u2665-cabbages.blogspot.com...-for-epub.html
- To remove the DRM, and the book loaded perfectly. I can recommend this method, as it was very easy and completely painless.
And just to reiterate, I only removed the DRM from a book I
purchased from Waterstones!
Thanks,
Mark