Background information on the Police College, Hendon, can be found on the Metropolitan Police website at http://www.met.police.uk/history/peel_centre.htm and a local archive website at http://www.barnet.gov.uk/index/leisure-culture/libraries/archives/archives-histories/archives-hendonhistories/archives-hendon-hendonpolicecollege.htm.
A number of websites representing the interests of the policeman are available: That of the Police Federation can be found at http://www.polfed.org; specific interests of Metropolitan workers at http://www.metfed.org.
Although organised on similar lines to their English and Welsh colleagues, the Scottish Police has its own structure with the interests of its workers in the hands of the Scottish Police Federation. Their website is http://www.spf.org.uk.
British Transport Police, not covered in these modules, is concerned solely with policing of the railways and is a separate body. British Transport policemen have their own Federation whose website is http://www.btpolfed.org.uk.
L.V. Allen,'The National Union of Police and Prison Officers', Economic History Review, 11, 1 (1958), pp. 133-43.
C. Emsley, The English Police: A Political and Social History (Harlow, 2nd edn., 1996).
V.A.C. Gatrell, 'Crime, Authority and the Policeman-State', in F.M.L. Thompson (ed.), The Cambridge Social History of Britain 1750-1950, Vol. 3: Social Agencies and Institutions (Cambridge, 1990), pp. 243-310.
J.B. Lopian, 'Crime, Police and Punishment, 1918-1939: Metropolitan Experiences, Perceptions and Policies' (unpub. Ph.D., University of Cambridge, 1986).
H. Shpayer-Makov, The Making of a Policeman: A Social History of a Labour Force in Metropolitan London, 1829-1914 (Aldershot, 2002).