Plaistow (UK Parliament constituency)

Plaistow was a borough constituency returning a single Member of Parliament to the House of Commons of the Parliament of the United Kingdom through the first-past-the-post voting system. The constituency was one of four divisions of the Parliamentary Borough of West Ham, which had at the time the same boundaries as the County Borough of West Ham. Although administratively separate since 1889, the area was formally part of the county of Essex; since 1965 it has been part of the London Borough of Newham in Greater London.

More information on the Wikipedia page.