I recentely sent an email to a UK cruise agent asking the following:- Your UK site (have withheld site ) prices up the same cruise as as available on your US site but about Ã‚Â£ 500 more. There response was the following. Princess Cruises UK operates as a separate company from Princess Cruises US. They do not allow UK customers to purchase anywhere except from the UK and US customers to purchase only from the US. This is a UK government agreement when Carnival Corporation purchased Princess. We are a separate website than the US website. So please ignore the US pricing. You might notice we can discount Royal Caribbean and Celebrity and RCCL International does not allow discounting in the US. So it works both ways. Princess US will probably reject your booking with a UK address and passports. We must prove all our bookings have UK passports and addresses. There second response was On Royal Caribbean, the travel agent must give on board credit to a maximum of 10% of th cruise fare. In the UK, we give 15% of the commission. Princess and Cunard are the only two that are quite rigid. If they discover that you live in the UK and have booked through the US, they have been known to refund and cancel the cruise. any thoughts ??