30 December 2012, Martin McGuinness formally announced he would resign his Westminster seat with immediate effect. Sinn Féin's Francie Molloy won the resulting by-election in March 2013. Members of Parliament Elections Elections in the 2010s Elections in the 2000s Elections in the 1990s Between 1992 and 1996 there were significant boundary changes, creating the new seat of West Tyrone. This had a huge knock on effect on Mid Ulster, which lost all its areas in Omagh and Strabane district councils, and gained the Torrent LGD in Dungannon from Fermanagh and South Tyrone, and the parts of Magherafelt District Council previously in East Londonderry. Therefore, the implied 1992 election results are very different from the actual ones and are displayed above. Elections in the 1980s Elections in the 1970s Elections in the 1960s Elections in the 1950s The seat was awarded to Beattie on petition on the grounds that Mitchell's conviction as a felon made him ineligible to sit in Parliament. However, Beattie in turn was also found ineligible to sit due to holding an office of profit under the crown, triggering a further by-election. Mitchell was subsequently unseated by a resolution of the House of Commons, on the grounds that his terrorist convictions made him ineligible to sit in Parliament. See also List of parliamentary constituencies in Northern Ireland References Further reading F. W. S. Craig, British Parliamentary Election Results 1918 – 1949 F. W. S. Craig, British Parliamentary Election Results 1950 – 1970 External links 2017 Election House Of Commons Library 2017 Election report A Vision Of Britain Through Time (Constituency elector numbers) Guardian Unlimited Politics (Election results from 1992 to the present) http://www.psr.keele.ac.uk/ (Election results from 1951 to the present) Westminster Parliamentary constituencies in Northern Ireland Politics of County Tyrone Politics of County Londonderry