A new conservatory has doubled the footprint at the luxuriously inviting Blue Bar, seamlessly marrying Richard Rogers’ glass pavilion (shades of a VIP airport lounge) to the David Collins-designed snug (a flatteringly lit, seductive salon complete with periwinkle-blue panels by Edwin Lutyens). Bar manager Rashid Ghuloom (ex-Berners Tavern) has produced a lavish drinks list that is colour-coded according to style and strength. Light, refreshing and low in alcohol, La Limonata adds sparkling lemongrass mineral water to kaffir lime, limoncello and blue agave nectar, while punchier hits include the deeply rewarding Smoke & Mirrors (a Manhattan involving Michter’s barrel-strength rye whiskey, Bénédictine, toasted cinnamon, rosehip, sherry and Madeira, produced in a puff of smoke from a crystal decanter). With its bold new space, tastefully tweaked design, five-star service, classy snacks, vintage Champagnes and top-notch whiskies, The Blue Bar is back with a bang.