Hmmm - I'm in central London, and don't recall ever seeing a Dunnes. Too bad, as it sounds great value for money.
I'm hesitating a bit on whether or not to save the ones I got for Christmas Eve, as they're not Christmasy at all - just ruffly with a fairy. Last year, dd love the ones with snowflakes, and I felt a good mummy who had found the "perfect" festive sleepwear.