1. 1906–08 Commission, see Royal Commission upon the Duties of the Metropolitan Police.
2. 1928/29 Commission, see Royal Commission on Police Powers and Procedure.
3. Ascoli, D. (1979). The Queen’s Peace: The Origins and Development of the Metropolitan Police, 1829–1979. London: Hamish Hamilton.
4. Bearman, C. J. (2010). The Legend of Black Friday. Historical Research, 83(222), 693–718.
5. Brien, A. M. O. (1994). Churchill and the Tonypandy Riots. Welsh History Review= Cylchgrawn Hanes Cymru, 17(1), 67.