I had a quick chat with a manager at Tesco today when I couldn't find something (as I have done before at various other supermarkets). She said that they were trying to be responsive to 'our' needs, if we let them know.
An idea popped into my head that I could write and ask them to accompany me on a shopping trip, and I could point out things I couldn't find, etc.
Would anyone else be up for joining in on this at their local supermarket? Maybe if we all speak up someone will listen!!