A new wine bar with connections to one of the world’s greatest wines is to open in Marylebone next month.

Clarette – which could be translated as “little claret” – is the brainchild of Alexandra Petit, daughter of Corinne Mentzelopoulos, who owns Château Margaux, one of the four original premier cru wines of Bordeaux.

Her partners in the wine bar – which is completely independent of the chateau – are restaurateur Natsuko Perromat du Marais and wine expert Thibault Pontallier, son of the late Paul Pontallier, Margaux’s longtime winemaker and general manager.

They promise Clarette will “break all the rules of a traditional wine bar”, although it is not clear what this means beyond trainers being acceptable footwear. The townhouse venue comprises a bar with a large communal table, an outdoor terrace, a cosy room with a fireplace on the first floor and a private dining room on the second.

The wine list will focus on France but with wines from around the world. A selection will be available by the glass from £5 – worth knowing when a single bottle of Margaux costs about £500. The food menu is designed around sharing plates to compliment the wines.

Petit came to London to study for an MA in art history at Sotheby’s, and has been a brand ambassador for Château Margaux for five years.