Have just been to my local waitrose, where they have £1 off, when you buy any sandwich, walkers crisps & a small bottle of Tropicana orange juice.
I bought an egg & cress sandwich £1.30, walkers crisps £0.47, bottle of Tropicana £1.10, and got £1.00 off. making the total £1.87
BTW - reduced sandwiches still have the £1 discount!!!!
For me, this is a good deal because where I live, waitrose is the closest supermarket to me.