A cup of tea with a few biscuits on the side is a snack indelibly linked with British life. And many people think nothing of taking one of the biscuits and happily dunking it in their hot beverage.
But to dunk a biscuit in a drink is just not done if proper etiquette is to be observed, according to former royal butler Grant Harrold. Harrold, who served King Charles III when he was Prince of Wales, says a cup of tea should always be "sipped and enjoyed" and not be used as a medium for dunking - giving specific reasons why.
Harrold has teamed up with gaming website Slingo to offer his etiquette knowledge on National Biscuit Day. One biscuit with a cup of tea is sufficient, he says, but it should never be more than two or three at a time as demolishing three digestives is "overindulgent".