Twenty percent, and we take your word for it
Who it is for
Anybody living in the two villages. Not a postcode check, not a bill, and not a card to carry.
Why no proof
Checking would cost more than any misuse and would make a friendly thing feel like a border. We have not regretted it.
How to use it
Say so at the counter, or use the word on the page at checkout. Nobody will ask a second question.
