Jason Atherton launched his new Mayfair restaurant, The Betterment, on Thursday. It is, coincidentally, across the square from Gordon Ramsay’s new Lucky Cat. Ramsay was Atherton’s boss for ten years, of course.

Atherton’s project forms an integral part of the latest instalment in Hilton’s growing collection of luxury hotels, Hilton LXR Hotels & Resorts. It sits on Grosvenor Square in Mayfair and is every bit as lavish in design as the food is in execution. Think whisky trolleys and truffle shavings on lobster-fuelled scrambled eggs.

Opposite The Betterment is the The Pine Bar, which focuses on cocktails, wines, and bar snacks, including home-made charcuterie. There’s also a Tea Lounge in the hotel lobby, which also features sandwiches, Dorset spiced apple cake, and lemon and lavender macarons.

Dishes in the restaurant proper include roast chicken, trompettes with Albufera sauce; native lobster with a white port bisque; ox cheek tortellini with horseradish velouté; and line caught sea bass, Fowey oyster and cucumber (£32).

Sides include confit Basque peppers; beef dripping chips with truffle and mushroom ketchup; and New Forest wild mushrooms with smoked egg yolk. Wines are suitably high-end.

“The Biltmore Mayfair has been an incredibly exciting launch to be involved in, and I’m thrilled that the day has come where we can finally show off The Betterment to you all,” said Atherton.

“We’ve focused the menu on sharing dishes and innovative sides, which draw on flavours from all around the globe. With its year-round terrace and relaxed atmosphere, the aim is to offer affordable luxury that injects a bit of fun into London’s most elegant district.

“It’s been nearly a decade since I left Maze and Grosvenor Square and I couldn’t think of a better way to be returning – especially with world-class chef and friend, Paul Walsh, by my side.”