I'm not sure how much sense this makes as I've confused myself so much trying to do this.
I'm using Drupal 7.28 and the Drupal Commerce 7.x-1.9.
Basically the image and the description fields are both on the Product Type not the content type as each product has its own description and image.
In my view I now need to add the image field, but I can't add it, which I believe is because the field isn't in the content type.
When I add the 'Content: Referenced Products' relationship to the view, I am then able to add the image field to my view.
However when I then select to link this image field to the original content, the field links to the admin page where I edit the product - not the content type node that is displaying the product.
Also, after adding the image field, the view lists the image for every single product variation whereas I just need one image that links to the node.