Dunno what was happening but deleting it all out and starting again seems to have fixed it (I can't spot any difference between what I posted above though!)

But, that's brought on another thing to solve. Can I format the pictures (dimensions)? If I do F9 to update, then change the size (to expand to fill the cell), when I preview or run it properly, they revert to their native size. These are images from all over the place so manually editing them is not an option.

Thanks!