The Maze Grill is on a sinister street in Chelsea, between a small Tesco — a boutique Tesco? — and a shop selling ugly sculptures of cats. The Chelsea Physic Garden, with its poisoned plants and amazingly posh Sunday walkers, is nearby. I cannot walk in the Physic Garden without hearing the howls of property developers from the skies, longing to destroy it, because what is it for, this garden and its small carnivorous plants, these tiny, dangerous Chelsea-ites?

The Maze Grill is the fifth restaurant of that brand from Gordon Ramsay, who operates 25 restaurants globally from Las Vegas to...