Saw these yesterday at Heron Foods in Ball Hill Coventry store. I know they are on promo at Tesco and Morrisons at £1.00 for 4 at the moment. Even 75p for 4 pots was good but it's also 2 packs (8 pots)for £1! Don't know if national and they only had the vanilla flavour.
Muller Simply Bliss Whipped Greek Style Vanilla Yoghurt 75p for 4 or 2 Packs for £1 @ Heron Foods.