Alternatively, you could give this firefox plugin a try:
https://addons.mozilla.org/en-US/fir...ox/?src=search
It serves a similar purpose as a VPN; it will anonymize your IP and you can trick the Amazon server (or whichever server) into believing that you're in the UK. However, I don't recommend you keep the add-on for long-- it's littered with adware and prompts to delete your cookies every time you visit a new webpage. Better you get what you need done, then remove the add-on afterwards. Better than buying a temp subscription to do the same thing, I'd wager.