In reply to Mark Kemball:
Hi Mark, the default behaviour from that button is to add it to the basket. There's a notification that pops up but this appears to be glitchy. It's working for me but not someone else that just tested it.
The button normally says "Add to Basket" instead of "Pre-Order Now" so it's more obvious about what it's going to do.
I've made the system go to the Basket page after clicking that button now. It's a lot more obvious, thanks for highlighting this!