Brigadier Sir Percy Robert Laurie (5 November 1880 – 16 February 1962) was a British Army and police officer. Laurie was born in Sevenoaks, Kent, and educated at Harrow School. He was commissioned Second Lieutenant in the 3rd London Volunteer Rifle Corps in August 1901 and transferred to the Regular Army in the Royal Scots Greys in March 1902. He was stationed with his regiment in South Africa for the aftermath of the Second Boer War, and promoted Lieutenant in October 1903. In October 1909 he was appointed regimental adjutant. In August 1911 he became ADC to General Sir Charles Douglas, General Officer Commanding Southern Command, and was promoted Captain in October 1911, in March 1912 he accompanied Douglas as ADC when he became Inspector-General of the Home Forces, and in 1914 he accompanied him again as personal assistant to the Chief of the Imperial General Staff. During the First World War he served successively as assistant provost-marshal of a cavalry division and a corps. He was mentioned in despatches six times and in January 1916 was promoted Brevet Major and awarded the Distinguished Service Order (DSO). He was promoted Temporary Lieutenant-Colonel in November 1917 and appointed provost-marshal of the Fourth Army and later the Second Army. He also received the Belgian Croix de Guerre in March 1918, the French Croix de Guerre in November 1918, the Order of Leopold and the Order of the Crown of Belgium, and the Order of the Crown of Italy. In February 1919 he went on half-pay and was appointed Deputy Assistant Commissioner "A" in the Metropolitan Police in London, in command of the Mounted Branch and with direct supervision of the four police districts under the Assistant Commissioner "A". In July 1919 he was promoted substantive Major in the Army and in October 1919 he formally retired with the substantive rank of Lieutenant-Colonel. He was put in charge of restoring morale following the 1919 police strike and also organised the policing of the victory march and other commemorations of the war. He pioneered police aviation and organised the first experiments in Britain with using the airship R33 to watch the crowds on Derby Day in 1921. Under his command, the Metropolitan Police Mounted Branch training depot at Imber Court was established. He also pioneered the use of police dogs in Britain. He was appointed Commander of the Order of the British Empire (CBE)