Police; split between North Yorkshire Police, Humberside Police, Durham Constabulary and Cleveland Constabulary. Irish police forces The partition of Ireland under the terms of the Government of Ireland Act 1920 and the subsequent independence of the Irish Free State in 1922 led to the replacement of the Royal Irish Constabulary with the Garda Síochána (in the Free State, later Éire or Republic of Ireland) and by the Royal Ulster Constabulary (in Northern Ireland). Defunct police forces in Ireland: Royal Irish Constabulary (RIC) - replaced in 1922 by the Garda Síochána and the Royal Ulster Constabulary Belfast Town Police - absorbed into the Royal Irish Constabulary in 1865 Londonderry Borough Police - absorbed into the Royal Irish Constabulary in 1870 Dublin Metropolitan Police (DMP) - authority transferred to the Irish Free State in 1922; absorbed into the Garda Síochána in 1925 Royal Ulster Constabulary (RUC) - dissolved in 2001, replaced by the Police Service of Northern Ireland Ulster Special Constabulary (USC or "B Specials") - replaced by the Ulster Defence Regiment and the RUC Reserve in 1970) Scottish police forces Each police burgh had a police force originally, although many merged in the 19th century. The gradual process of amalgamation culminated with the creation of a single Police Service of Scotland in 2013. Abolished 1930 The Local Government (Scotland) Act 1929 merged two pairs of county constabularies. Kinross-shire County Constabulary to Perthshire and Kinross-shire Constabulary Morayshire County Constabulary to Moray and Nairn Constabulary Nairnshire Constabulary to Moray and Nairn Constabulary Perthshire County Constabulary to Perthshire and Kinross-shire Constabulary Abolished 1931–1946 Lerwick Burgh Police 29 May 1940 to Zetland Constabulary Zetland County Police 29 May 1940 to Zetland Constabulary Abolished under the Police (Scotland) Act 1946 Aberdeenshire Constabulary 16 May 1949 to Scottish North Eastern Counties Constabulary Banffshire Constabulary 16 May 1949 to Scottish North Eastern Counties Constabulary Berwickshire Constabulary to Berwick, Roxburgh and Selkirk Constabulary Bute County Constabulary to Renfrew and Bute Constabulary Clackmannanshire Constabulary 1949 to Strling and Clackmannan Constabulary Dumfriesshire County Police 16 February 1948 to Dumfries and Galloway Constabulary Dunfermline City Police 16 May 1949 to Fife Constabulary East Lothian Constabulary to Lothians and Peeblesshire Constabulary Fife County Constabulary 16 May 1949 to Fife Constabulary Kincardineshire Constabulary 16 May 1949 to Scottish North Eastern Counties Constabulary Kirkcaldy Burgh Police 16 May 1949 to Fife Constabulary Midlothian Constabulary to Lothians and Peeblesshire Constabulary Moray and Nairn Constabulary 16 May