Why are my updated product images not showing in my live site?

Site URL: http://kingfisherfarmshop.com

I am trying to build the new online shop for our Farm Shop in Surrey, UK. I have created all the products in the shop using placeholder images and I have now updated those images to the final images that I would like to be viewed in the live shop... and YET the updated images are not showing in the shop when I make it live! The updated images seem to show in the editing screen (left hand side of image in attachment) but not in the screen that shows the actual website (right hand side). 

I have tried restarting my computer, refreshing pages, clearing cache etc etc but nothing seems to work... 

Does anyone have any idea what I am doing wrong?!?!