Having taken advantage of Nationwide's 6 month 0% interest offer on their credit card, no doubt like most people, when the 0% offer expired i phoned and asked to be changed to the cashback card. They said they had to cancel the old one and re-issue a new one, didn't take very long.
I have just received my first statement on the cashback card and i am astonished to see that my cashback is being calculated at 1%, not 0.5%.
How excellent is that, two bites at the cherry. Surprised no one has mentioned this before.