variants. Although the home wear version of full dress is no longer worn (except in a modified form by RAF bandsmen), the tropical full ceremonial dress continues to be authorised. The temperate full dress uniform was introduced in April 1920. It consisted of a single-breasted jacket in blue-grey with a stand-up collar. Rank was indicated in gold braid on the lower sleeve and white gloves were worn. As with the British Army after 1914, full dress was not general issue during the inter-War period, but was authorized for wear by specific categories such as bandsmen and commissioned officers. The latter generally wore full dress only for infrequent occasions such as attendance at court levees and social functions such as weddings. Military attaches and royal aides de camp were amongst the few serving officers who might have regular occasions to wear full dress. Initially the full dress uniform was worn with the service dress cap. However, in 1921 a new form of head-dress was introduced. It was designed to resemble the original flying helmet and it consisted of a leather skull cap trimmed with black rabbit fur. The helmet also featured an ostrich feather plume which was connected to an RAF badge. This helmet was never popular and junior officers were eventually permitted to wear the service dress hat on full dress occasions. Group Captain the Duke of York (later King George VI) wore RAF full dress at his wedding to Lady Elizabeth Bowes-Lyon in 1923. The Duke wore or carried the full dress headgear rather than the service dress cap. Today the blue-grey full dress uniform is only worn by RAF bandsmen. It is referred to as Number 9 Service Dress. Royal Navy Since the mid-eighteenth century, when naval uniforms were introduced, flag officers had different full-dress and undress versions, the latter being worn from day to day, the former only for formal occasions. By the late nineteenth century, an officer's full dress uniform consisted of a navy double-breasted tailcoat with white facings edged in gold (on the collar and cuff-slashes), gold lace (indicating rank) on the cuffs, epaulettes, sword and sword-belt, worn with gold-laced trousers (except for sublieutenants and warrant officers) and a cocked hat. This order of uniform lasted through the first half of the twentieth century, being placed 'in abeyance' at the onset of the Second World War, and was worn by Prince Philip at the Coronation