Shut the biscuit tin, defenestrate your cup of tea, this is serious snack news: you have been eating chocolate biscuits upside down.

Biscuits in fact have the chocolate on the bottom of the biscuit, not the top, McVitie's have confirmed, meaning Digestives, Hobnobs and more have a history of being eaten the wrong way up.

The news sent shockwaves across the UK's subreddit, after a user posted an email from United Biscuits explaining their composition.

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"For your information," a spokesperson wrote, "the biscuits go through a reservoir of chocolate which enrobes them so the chocolate is actually on the bottom of the biscuits and not on the top."

The note not only serves to turn snacking on its head, but confirms the existence of a chocolate reservoir.

The Independent contacted McVitie's in the good name of biscuity journalism, who provided further clarification: "The McVitie’s stamp is on the other side, which is the top of the biscuit."

The shocking news, which throws into question the Malted Milk, Choco Leibniz and other semi-chocolate covered favourites, follows a scientific study that determined that the Rich Tea is the superior biscuit in terms of dunking.