<P> Margaret Beckett is the longest serving female MP in the history of the House of Commons . She was an MP for Lincoln from 10 October 1974 until 7 April 1979, and has served as MP for Derby South since 9 June 1983, most recently being re-elected on 8 June 2017 . </P> <P> Harriet Harman is the longest continuously serving female MP in the history of the House of Commons . She was MP for Peckham from 28 October 1982 until 1 May 1997, and has served as MP for Camberwell and Peckham since 1 May 1997, most recently having been re-elected on 8 June 2017 . On 13 June 2017 Harman was dubbed "Mother of the House" by Prime Minister Theresa May, in recognition of her status as longest continuously serving woman MP (though she was not the longest serving MP overall, and would therefore not gain any official duties). </P> <Table> <Tr> <Th_colspan="2"> Party </Th> <Th> Name </Th> <Th> Constituency </Th> <Th> Year elected </Th> <Th> Year left </Th> <Th> Length of continuous term </Th> <Th> Length of cumulative term </Th> </Tr> <Tr> <Th> </Th> <Td> Conservative </Td> <Td> Astor, Nancy Nancy Astor </Td> <Td> Plymouth Sutton </Td> <Td> 1919 </Td> <Td> 1945 </Td> <Td> 25 years, 7 months </Td> <Td> </Td> </Tr> <Tr> <Th> </Th> <Td> Labour </Td> <Td> Lee, Jennie Jennie Lee </Td> <Td> North Lanarkshire & Cannock </Td> <Td> 1929 & 1945 </Td> <Td> 1931 & 1970 </Td> <Td> </Td> <Td> 27 years </Td> </Tr> <Tr> <Th> </Th> <Td> Conservative </Td> <Td> Ward, Irene Irene Ward </Td> <Td> Wallsend & Tynemouth </Td> <Td> 1931 & 1950 </Td> <Td> 1945 & 1974 </Td> <Td> </Td> <Td> 37 years </Td> </Tr> <Tr> <Th> </Th> <Td> Labour </Td> <Td> Castle, Barbara Barbara Castle </Td> <Td> Blackburn </Td> <Td> 1945 </Td> <Td> 1979 </Td> <Td> 33 years, 9 months </Td> <Td> </Td> </Tr> <Tr> <Th> </Th> <Td> Labour </Td> <Td> Dunwoody, Gwyneth Gwyneth Dunwoody </Td> <Td> Exeter, Crewe & Crewe and Nantwich </Td> <Td> 1966 & 1974 </Td> <Td> 1970 & 2008 </Td> <Td> 34 years, 2 months </Td> <Td> 37 years, 9 months </Td> </Tr> <Tr> <Th> </Th> <Td> Labour </Td> <Td> Beckett, Margaret Margaret Beckett </Td> <Td> Lincoln & Derby South </Td> <Td> 1974 & 1983 </Td> <Td> 1979 & Still serving </Td> <Td> </Td> <Td> 38 years </Td> </Tr> <Tr> <Th> </Th> <Td> Labour </Td> <Td> Harman, Harriet Harriet Harman </Td> <Td> Peckham, then Camberwell and Peckham </Td> <Td> 1982 </Td> <Td> Still serving </Td> <Td> 35 years </Td> <Td> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Party </Th> <Th> Name </Th> <Th> Constituency </Th> <Th> Year elected </Th> <Th> Year left </Th> <Th> Length of continuous term </Th> <Th> Length of cumulative term </Th> </Tr>

Longest continuously serving female mp in house of commons