the "gor blimey", these caps are associated with the First World War 'Tommy Atkins' and continued to be issued to members of the Household Cavalry, Foot Guards, Home Guard and Territorial Army during the Second World War. All personnel of most regiments and corps of the British Army wear a forage cap, as the peaked cap is formally called, in numbers 1 and 2 dress, the exceptions being: The Royal Tank Regiment, Royal Regiment of Fusiliers, Army Air Corps, Parachute Regiment, Special Air Service, Intelligence Corps and 4/73 (Sphinx) Special Observation Post Battery RA, who wear berets; The Royal Regiment of Scotland, who wear a regimental Glengarry with cockfeathers taken from the former ceremonial uniform of the Royal Scots; The Royal Irish Regiment, who wear the caubeen; The Brigade of Gurkhas, who wear a round Kilmarnock cap in no 1 dress and the slouch hat in no 2 dress The Queen's Royal Hussars, whose officers wear a tent hat in no 2 dress. It has a cap band which may be coloured (red for all royal regiments and corps), a crown (formerly khaki, now dark blue, except for the Royal Military Police, who have always worn red, and the Rifles, who wear rifle green), which may have coloured piping or a regimental/corps colour, and a patent leather peak and chinstrap. The chinstrap is usually secured above and across the peak and secured at each end by a small (20 line) button of the appropriate regimental or corps pattern. Officers in some regiments are also required to wear a khaki version of the cap, often called the "service dress cap", with service dress (the officers' no 2 dress) or barrack dress; the design of this dates back to the cap worn in the field until replaced by the steel helmet during the First World War. Female personnel wear a peaked cap of a different pattern. For uniformity, however, female musicians wear the same peaked cap as male personnel in formal dress. Members of the Auxiliary Territorial Service wore a soft peaked cap of a different pattern again. Royal Air Force All male personnel of the Royal Air Force wear a cap with a blue-grey crown and a black band, worn with the appropriate badge, in no 1 dress, and sometimes in other uniforms as well. The peak is: Black and polished for airmen, non-commissioned officers (NCOs) and warrant officers Blue-grey fabric