There were a couple of files that the template that I was using was out of date that I had to do things with
cart/cart.php because it had a paypal alert
/product-content.php I deleted because I couldn’t see a change I’d made
loop/add-to-cart.php was to do with the variations being in the category pages so I put in amended code – but this might mess up when the shop reopens to take note
I have some backups of those old files anyway.