Planning permission is being sought for a luxury 102-bedroom hotel with conference facilities, named-chef restaurant, bar, a Wellness Spa and swimming pool, the In and Out, on London’s Piccadilly.

A group of developers led by Tower Properties Management plan their new hotel, along with four private residences on the site to comprise 90-95 Piccadilly, 42 Half Moon Street and 10-12 White Horse Street, all of which are currently in a dilapidated condition.

The main building at 94 Piccadilly, now a Grade 1 listed, started life as an 18th century mansion house called Egremont, later called Cholmondeley and then Cambridge House after a Marquis and then a Duke occupied it. Later it served as the home of Prime Minister Lord Palmerston until his death in 1865, when it was converted and extended to provide a base for the Naval and Military Club, which was founded in 1862 and became known as the “In and Out Club” due to the prominent IN and OUT signs on the separate gates for vehicular entrance and exit. In 1999 the club, which boasts Prince Philip as its President and T.E. Lawrence among its former members moved to new premises in St James Square and the building has been unused since, although there was a 2011 plan to convert it into a 48-room private house.