I had 'Standard - Mix algorithm selected. Changing this to Elastique Pro (all three options) had no effect.
I clicked and unclicked 'Musical Mode. No Effect.
I dropped back to the main window and set ‘Global Transpose’ from there. Again, it made no difference.
I tried closing Cubase and then restarting it with the new settings in place and importing a new wav file. It still plays slightly sharp. Doh!! 
Thank you for the response. 
I’m really hoping that I can get this licked.