"When you use contactless in the local shop you don't get a receipt..."
You should always ask for one, ummmm, regardless of what method of payment you use.
I love my contactless debit card. Dead handy in the pub when buying three or four pints of Crudgingtons' Old and Filthy when in town with my Old Codger mates. Saves having to keep going to the bank to get beer vouchers. I think we've all got to move on despite our misgivings. I can see a time, not too far ahead, when the only places that will accept cash will be those keeping two sets of books (one real and one for the VATman).