I think this is because the WW wholemeal pittas seem to have been replaced by a new WW 50/50 pitta in the supermarkets. So, for as long as you can get your hands on the wholemeal pittas I would assume they're still a HExB, however the new 50/50 ones are not. I'm guessing it's similar to the 70 / 80 cal Alpen Light issue which arose earlier in the year x