Question: Who much area did the territorial police force covered which was proposed to merge with Merseyside Police?

Context paragraphs:
Grampian Police: Grampian Police was, between 1975 and 2013 (replaced by Police Scotland), the territorial police force of the northeast region of Scotland, covering the council areas of Aberdeenshire, the City of Aberdeen, and Moray (the former Grampian region).  The Force area also covered some of the North Sea, giving Grampian Police the responsibility of policing the oil and gas platforms of the North East.  The force was headquartered on Queen Street in Aberdeen.

Tayside Police: Tayside Police was a territorial police force covering the Scottish council areas of Angus, City of Dundee and Perth and Kinross (the former Tayside region) until 1 April 2013, at which point it was subsumed into Police Scotland.  The total area covered by the force was 2896 sqmi with a population of 388,000.  The force operated from 27 police stations and has an establishment of 1078 police officers, 151 special constables and 594 support staff, as of February 2008.  Tayside Police was Scotland's fourth-largest police force.

Bosnian Police: The Bosnian Police consists of thirteen sub-state territorial police forces and two specialist state-level police forces.  The two main police bodies in Bosnia and Herzeogvina are governed by the Directorate for Coordination of Police Bodies of Bosnia and Herzegovina.  Each of the two entities, the Federation of Bosnia and Herzegovina and Republika Srpska has their own police force.  In the latter, this is a central force covering the whole entity, in the former a specialist force covering specific crimes and those crimes that cross internal, Cantonal, borders.  In the Federation of Bosnia and Herzegovina, there are ten Cantonal police forces, each under a Cantonal Ministry of the Interior.  The District of Brčko, in Northeast Bosnia, also has its own police force.  At the level of the central state, Bosnia and Herzegovina also has a police agency focused on Counter Terrorism, Organised Crime and crime crossing international borders, the State Investigation and Protection Agency (SIPA), and a State Border Service.  Although agreement was reached on unifying the police forces, much like the armies were unified, it has yet to be realised.

Merseyside Police: Merseyside Police is the territorial police force responsible for policing Merseyside in North West England.  The service area is 647 square kilometres with a population of around 1.5 million.  As of March 2009 the service has 4,494 police officers, 2,221 staff, 442 police community support officers and 420 special constables.  The service operates under the oversight of the Police and Crime Commissioner, Jane Kennedy.  A proposal to merge the force with the Cheshire Constabulary to form a strategic police force was made by the Home Secretary on 6 February 2006 but later abandoned.

Warwickshire Police: Warwickshire Police is the territorial police force responsible for policing Warwickshire in England.  It was known as Warwickshire Constabulary until 2001.  It is the second smallest territorial police force in England and Wales after the City of London Police, with only 998.6 (full-time equivalents) regular officers as of December 2006.  The resident population of the force area is 552,000.

Durham Constabulary: Durham Constabulary is the territorial police force responsible for policing the non-metropolitan county of County Durham and the unitary authority of Darlington.  The force covers the 2,232 km² of the county which has a resident population of 595,308.  It is one of the smaller forces of the 43 territorial police forces that service England and Wales.  Durham is Home Office force 11.

Cheshire Constabulary: Cheshire Constabulary is the territorial police force responsible for policing the English unitary authorities of Cheshire East, Cheshire West and Chester, Halton (including Runcorn, and Widnes) and Warrington.  The force is responsible for policing an area of 946 sqmi with a population of roughly 1 million.

Merseyside Police and Crime Commissioner: The Merseyside Police and Crime Commissioner is the police and crime commissioner, an elected official tasked with setting out the way crime is tackled by Merseyside Police in the English County of Merseyside.  The post was created in November 2012, following an election held on 15 November 2012, and replaced the Merseyside Police Authority.  The current incumbent is Jane Kennedy, who represents the Labour Party.

Liverpool and Bootle Constabulary: Liverpool and Bootle Constabulary was a short-lived police force in England from 1 April 1967 to 1 April 1974.  It was created as a merger of the Liverpool City Police and Bootle Borough Police, and covered the adjacent county boroughs of Liverpool and Bootle.  It was amalgamated under the Local Government Act 1972 with parts of the Lancashire Constabulary and Cheshire Constabulary to form Merseyside Police.  Its Chief Constable for the entire duration of its existence was Sir James Haughton.

Law enforcement in the Republic of Ireland: Ireland has a single national civilian police force, Garda Síochána na hÉireann ("Guardians of the Peace of Ireland").  This force is responsible for all aspects of territorial civil policing.  The Garda Síochána have been the only territorial police force in the Republic since their merger with the Dublin Metropolitan Police in 1925.

Supporting paragraphs: Merseyside Police Cheshire Constabulary
Answer: 946 sqmi