[Sisom]

Thanks guys, I understand what is happening now. The product pulls the term 'SKU1' from the Product Management page, so there isn't anywhere I can change the variable to stop it pulling through the 'SKU' part, it's simply the same string that was entered (or automatically created) in the Product Management page.
So in this case (we haven't entered many products yet), the solution will be to simply change SKU1 to '1' as we enter new products.