Major Sir Philip Reginald Margetson KCVO MC QPM (2 January 1894 – 5 December 1985) was an Assistant Commissioner of the London Metropolitan Police.
In 1919 he became second-in-command of the 1/4th Battalion Royal Scots Fusiliers (Territorial Force) (which was then part of the Army of Occupation) in the rank of Acting Major.
[11][12] He joined the Metropolitan Police, entering directly as a chief inspector and taking the position of senior administrative officer at No.4 District (South London) headquarters on 1 December 1933.
In August 1936 he was promoted to Chief Constable and became deputy commander of No.2 District (North London).
In February 1940 he was promoted to Deputy Assistant Commissioner at "A" Department (Operations and Administration) of Scotland Yard and in August 1940 he was given command of No.1 District.
[17] He retired on 2 January 1957 (his 63rd birthday) and joined the board of Securicor, serving as chairman from 1960 to 1973, when he became honorary president.