I can confirm that
http://uniontechpc.com/ is a fraudulent website. They have actually copied the address from a genuine electronics retailer based in London. I reported the matter to Trading standards and I cancelled my card.
http://uniontechpc.com/ basically requests that you enter your card details and when you enter them it gives an error message for you to enter details of another card. Basically they are phishing for card details and trying to obtain as many card numbers as possible. These fraudsters have already been reported to trading standards and I would urge anyone who has tried to place an order with them to do the same. I have also noticed that these fraudsters have setup another site called
http://www.lxetronics.com/. Beware!