Ok, got further this time - but now 'Payment may be unsafe' - checking the details - not sure whether that is the shop thinks that, or paypal thinks the shop is, or what.
"This PayPal transaction seems to be unsafe and will be validated.
Your payment has been delayed.
Your order requires manual review by our customer support team. They will resolve this issue very quickly. Check back with the site within the next couple of hours."
Could also be because not a seppo, perhaps, so will see what happens.