After the war, Michelin returned its headquarters to London. The reduced staff meant only the front, original part of the building was occupied, while the rest of the building was leased. In 1950, a long term lease was signed by a new tenant for the space created in the 1912 and 1922 extensions. In 1952, an extension was added for the tenant. A steel frame construction, it extended part of the second floor and added a third floor along the Lucan Place side of the building. In 1960, Michelin and their tenant began a modernisation programme for the interior of the building. The programme went along with the general taste of the time, dividing the open plan office and making much use of wood panelling. Although the work concentrated on the interior of the building, updating the exterior of the building with a cement rendered facade was considered. On 15 April 1969 the original front section of the Michelin Building was given a Grade II listing. Despite this, outline planning permission was granted to demolish all but the listed part and build a ten-storey office block. Michelin instead decided to spend the money on a new factory in North America. Sale In 1985, Michelin put the building up for sale. It was located in an expensive and fashionable part of London, but did not fit their office requirements. Of the many people who made bids to buy Michelin House, the restaurateur and retailer Sir Terence Conran and Paul Hamlyn, owner of the Octopus Publishing Group, were friends who when they discovered they had been bidding against each other, formed a partnership to purchase it. In August 1985, it was sold to them for 8 million pounds. Plans were then set into action to create a new lease of life for Michelin House. Rebirth Conran and Hamlyn set up Michelin House Developments to redevelop the building, to include a major retailing store, restaurant, bar and large office space. In November 1985, Conran Roche and YRM, the architects and designers placed in charge, made an application for planning permission to increase the existing floor area from 90,000 to . This was to be achieved by building a new steel and glass structure that would fill the space occupied by the side loading bay on the Sloane Avenue side, and by also adding a new neater front end to the third floor plus