This will not do. No, this will not do. The only way to get back at them is to create your own chain of delicious cookies of all flavors and sizes - yes, I said sizes. Everyone loves jumbo cookies - and develop the best tasting custard cream known to mankind. Then, you can have your delicious cookies sold in stores such as Walmart, Target, Tom Thumb, small grocery stores and gas stations BUT you will not allow your cookies from heaven to be sold at Tesco so that in turn, their cookies will suffer from your success. Then, 20 years down the line, you may make a deal with Tesco that if you allow your products to be sold at their store (if it is still in business), they must promise all other custard creams must have the filling. It's the only way.