Big thanks to @Mihai for looking into and resolving my wp ecommerce issue -
The bug was that the shipping calculator was hidden in our check out page, the reason for this being hidden was we're using a table rate for shipping that currently can't be influenced by location. The shipping calculator appears to be more location orientated so we thought the shipping calculator was redundant and unnecessary for our customers
With the current upgrade the shipping calculator MUST be present if shipping is enabled. No matter what shipping method.
The css object that was used to hide the shipping calculator was .productcart
We made it visible, styled it according to our sites design and all is working ok on the current upgrade although the shipping calculator still seems a little redundant for table rated shipping without it being influenced by location.
A request was made so that not only can you use table rates for shipping but the shipping calculator could also add an amount depending on country, continent and then rest of the world which has been noted for a possible future upgrade, at the moment this isn't possible as wp ecommerce currently exists - fingers crossed for that feature being implemented and once again many thanks for the help with the fix!