Lanarkshire Constabulary
Lancashire & Yorkshire Railway Police
Lancashire Constabulary
Lancaster & Carlisle Railway Police
Lancaster & Preston Junction Railway Police
Lancaster Borough Police
Lancaster City Police
Langholm Burgh Police
Larne Harbour Police
Launceston Borough Police
Leamington Spa Police
Lee Conservancy Police
Lee Navigation Police
Leeds & Dewsbury Railway Police
Leeds & Liverpool Canal Police
Leeds City Police
Leicester & Rutland Constabulary
Leicester & Swannington Railway Police
Leicester Borough Police

Leicester City Police
Leicester(shire) County Constabulary
Leicestershire Constabulary
Leicestershire Rutland Constabulary
Leith Burgh Police
Leominster Borough Police
Lerwick Burgh Police
Lichfield Cathedral Close Constable
Lichfield City Police
Limerick City
Lincoln Cathedral Constables
Lincoln City Police

Lincoln County Constabulary
Lincolnshire Constabulary
Lincolnshire Police
Linlithgowshire Constabulary
Liskeard & Caradon Railway Police
Liskeard Borough Police
Liverpool & Bootle Constabulary
Liverpool & Manchester Railway Police
Liverpool Airport Police
Liverpool Cathedral Constables
Liverpool City Police
Liverpool Markets Police
Liverpool Parks Police
Liverpool Ports Police
Liverpool River Police
Llanelly Harbour Police
Llanelly Railway Police
London & Birmingham Railway Police
London & Blackwall Railway Police
London & Brighton Railway Police
London & Croydon Railway Police
London & Greenwich Railway Police
London & India Docks Company Police
London & India Docks Joint Committee Police
London & North Eastern Railway Police
London & North Western Railway Police
London & NW & GW Joint Committee Police
London & NW & Midland Railways Birmingham Joint Station Police
London & South Western Railway Police
London & Southampton Railway Police
London & St Katharine Docks Company Police
London Borough of Barnet Police
London Brighton & South Coast Railway Police
London Central Markets
London County Council Parks Police
London County Council Tramway SC
London Dock Police
London General Omnibus Company Police
London Midland & Scottish Railway Police
London Passenger Transport Board Police
London Port Authority Police
London Transport Police
London Underground Police
London, Chatham & Dover Railway Police
London, Tilbury & Southend Railway Police
Londonderry Harbour Police
Londonderry Municipal Police
Lothian & Peebles Constabulary
Lothian and Borders Police
Louth Borough Police
Ludlow Borough Police
Luton Airport Police

Luton Borough Police
Luton County Borough Police
Lyme Regis Borough Police
Lymington Borough Police
Lytham St Annes Special Constabulary