Tap to Pay Comes to UK Courtesy of Samsung and Orange

Samsung and Orange will be offering customers using the Samsung Galaxy S3 the opportunity to start using their phones to make payments courtesy of the embedded NFC chip.
Most UK bank accounts and cards are claimed to work with the new system and payments of up to £20 can be made.
The press release seems to suggest that only new contracts will get access to the technology, but doesn't seem to be sensible - my guess would be that existing S3 owners will be able to gain access to the service by swapping to a new SIM card.
To sweeten the deal new users cho register between September 5th and October 5th get £50 added to their accounts.
The offer is good at Orange stores and on their website.