Went to Leeds Merrion Centre Home Bargains and found Sensodyne Total care for 39p. Tesco sells it for £1 http://www.tesco.com/groceries/Product/Details/?id=259629885
Even at Home bargains, the 45 ml Sensodyne is being sold at £1.89.
So this is a great saving if you have sensitive teeth like myself. It seems this is a nationwide deal.
I have checked my receipt and it confirms the price. I am a bit lazy to take photo.