She had been a member (for the Northland District Electoral Area) of Derry City Council since 2001 and the Mayor of Derry in 2006-2007. She was awarded the Freedom of the City of London on 6 February 2007.
In November 2010 she confirmed that she would not contest elections in May 2011 and the SDLP announced that she was leaving public life. She resigned as SDLP leader on Derry City Council but would remain a member of the party.
- "Derry Mayor honoured by City of London". 6 February 2007. Archived from the original on 26 December 2010. Retrieved 15 February 2010.
- "Former Derry mayor Helen Quigley to quit public life". BBC NI News. 3 November 2010. Retrieved 18 November 2011.
- "Quigley confirms political exit". Derry Journal. 2 November 2010. Retrieved 18 November 2011.
- "SDLP meet again after shock Quigley move". Derry Journal. 5 November 2010. Retrieved 18 November 2011.
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