Buckingham Palace forms the architectural core of the palace was built for the first Duke of Buckingham and Normanby in 1703 to the design of William Winde. The style chosen was of a large, three-floored central block with two smaller flanking service wings. Buckingham House was eventually sold by Buckingham's natural son, Sir Charles Sheffield, in 1761 to George III for £21,000. Sheffield's leasehold on the mulberry garden site, the freehold of which was still owned by the royal family, was due to expire in 1774. Under the new Crown ownership, the building was originally intended as a private retreat for King
Buckingham Palace Road opposite the coach station, designed by Albert Lakeman, also in the Art Deco style. It allowed passengers to check-in before boarding special trains from Victoria Station to Croydon Airport or Southampton Docks for the flying boat service. The terminal continued in service until the end of the 1970s, by which time there were dedicated rail or bus connections to Gatwick and Heathrow Airports. It is now the headquarters of the National Audit Office. In June 1917, the Imperial Headquarters of The Boy Scouts' Association (since 1967, The Scout Association) moved to 25 Buckingham Palace Road from the previous office at