Gary, thanks. That didn't work for me so I'll play with your example until I understand what I did differently.
Update: on checking you are not deleting the actual pages only hiding them from access. Rut didn't want the mobile pages to be different to the main pages in some places.
Also, if you are relying on a menu to hide the access, a design might simply have Next & Previous buttons so you would have to change how these reached pages on both variants.
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