deposits. Boundaries The constituency was created for the 1945 general election when the Harrow constituency was split into the new seats of Harrow East and Harrow West. It was reduced in size for the 1950 general election, when a third Harrow seat, Harrow Central, was created. The Boundary Commission review before the 1983 general election saw the London Borough of Harrow contained in two seats, resulting in Harrow West gaining parts of the abolished Harrow Central. Labour's union leader Tony McNulty lost the neighbouring Harrow East in 2010 to Blackman, who held on in 2015 and 2017. However, Harrow West's Gareth Thomas retained his seat with a reduced majority. 2010 boundaries Reviewing such representation in North London, the Boundary Commission for England (de facto), as is custom agreed by Parliament, altered the area's limits to avoid malapportionment, as London's housing and rates of occupancy have altered. The western border district, town or neighbourhood of Pinner went to a new cross-Borough seat, Ruislip, Northwood and Pinner, making its source, based on a ward breakdown of the last result, and mirrored by local election results, a stronger seat for Labour; this was coupled with the inclusion of Marlborough ward which had returned many Labour councillors since World War II. Members of Parliament Election results Elections in the 2010s ''Note: From 2010 historically Conservative-strong Pinner formed part of the new seat Ruislip, Northwood and Pinner. The 2010 changes are not based on the 2005 result as the constituency underwent major changes. Elections in the 2000s Elections in the 1990s Elections in the 1980s Elections in the 1970s Elections in the 1960s Elections in the 1950s Elections in the 1940s See also List of parliamentary constituencies in London Notes References External links Politics Resources (Election results from 1922 onwards) Electoral Calculus (Election results from 1955 onwards) Parliamentary constituencies in London Politics of the London Borough of Harrow Constituencies of the Parliament of the United Kingdom established in 1945