of the North West Cambridgeshire seat, which incorporated the rural land outside Peterborough and several Conservative-inclined wards from the city. Since its formation, North West Cambridgeshire has been one of the safest Conservative seats in the country, whilst Peterborough was ranked 93rd in the Conservatives's one hundred most vulnerable seats (the ones which the other parties must take if there is to be a change of government) and 73rd on Labour's target list; these factors led Mawhinney to stand in North West Cambridgeshire instead. He retired as an MP in 2005 and was created Baron Mawhinney, of Peterborough in the county of Cambridgeshire. Helen Clark (née Brinton) won the seat for Labour in 1997. She was defeated by Conservative candidate Stewart Jackson at the 2005 election, following which it was widely reported that Clark was planning to defect to the Conservative Party, an announcement which was not popular locally. However, by early June it emerged that while she had left the Labour Party, she had not in fact joined the Conservatives and did not intend to. Jackson was re-elected in 2010 with an increased majority, which then fell in 2015. In 2017, Labour's Fiona Onasanya won a majority of 607; this result marked the first time since 1929 that Peterborough voted Labour in an election where the Conservatives won the national popular vote, and the first time it has ever elected a Labour MP in a year in which Labour did not form the government. Furthermore, Peterborough became one of five constituencies – the others being Croydon Central, Enfield Southgate, Leeds North West and Reading East – which elected Labour MPs in 2017 having not done so since 2001. Parliamentary borough 1547–1918 MPs 1542–1660 MPs 1660–1883 The Tories (or Abhorrers) and Whigs (or Petitioners) originated in the Court and Country parties that emerged in the aftermath of the civil war, although it is more accurate to describe them as loose tendencies, both of which might be regarded as conservative in modern terms. Modern party politics did not really begin to coalesce in Great Britain until at least 1784. MPs 1885–1918 In 1832 the Tory Party evolved into the Conservative Party and in 1859 the Whig Party evolved, with Radicals and Peelites, into the Liberal Party. In opposition to Irish home rule, the Liberal Unionists ceded from the Liberals in 1886, aligning themselves with the Conservatives. The Labour Party was later