Blair Associates has lodged plans to expand Claridge’s by redeveloping a 1980s building next to the five-star Mayfair hotel, and delivering more rooms and suites in a neighbouring grade II building.

The practice’s scheme would convert the 18^th-century building at 41-43 Brook Street – east of the main hotel – from office use, while a 30-year-old block to its immediate south in Brook’s Mews would be rebuilt from the ground up to provide a new art deco-themed eight-storey building.