In 2004, Blackman-Woods was selected as the Labour candidate for the
City of Durham constituency through an
All-Women Shortlist. In her previous work she had been known by her maiden name, Roberta Woods, but added her husband's surname, Blackman, after selection to avoid confusion with Liberal Democrat candidate Carol Woods. Elected at the
2005 general election with a majority of 3,274, Blackman-Woods made her maiden speech to the
House of Commons on 24 May 2005, making reference to the work of her predecessor
Gerry Steinberg, the importance to Durham of
Durham Cathedral, the
University of Durham and the historic legacy of mining within the area. Blackman-Woods was a member of the Joint Committee on Statutory Instruments from 2005 to 2010 and has also been a member of the Education and Skills
Select committee and the Business, Innovation, Science and Skills Select Committee. In 2006 she became the
Parliamentary Private Secretary to the
Chancellor of the Duchy of Lancaster,
Hilary Armstrong. This post lasted until Armstrong returned to the backbenches when
Gordon Brown became Prime Minister, but Blackman-Woods was then appointed PPS to the Secretary of State for Defence,
Des Browne, in 2007. Following Des Brown's retirement to the backbenches she served as PPS to
David Lammy MP as Minister of State for
Higher Education. She was also Chair of the All Party Afghanistan Group from 2005 and the All Party Balanced and Sustainable Communities Group from 2007. Blackman-Woods was also a member of the
Commonwealth Parliamentary Association and the
Inter-Parliamentary Union throughout her Parliamentary career.
In 2010, she was re-elected to Parliament with a majority of 3,067, and was appointed Shadow Minister for Business in June 2010, before being moved to shadow the Civil Society Minister by new Labour Leader
Ed Miliband in October 2010. In the October 2011 shadow cabinet re-shuffle, Blackman-Woods was moved to become Shadow Minister in Communities and Local Government covering planning policy and procurement.
In 2015, she was re-elected with a majority of 11,439, and was confirmed as the shadow housing minister. She resigned from the front bench in June 2016, before supporting
Owen Smith in the
2016 Labour leadership election. She subsequently rejoined the front bench on Corbyn's re-election. She was re-elected
in 2017 with a majority of 12,362, and in July 2017 she was appointed as a Shadow International Development Minister. On 16 July 2019 she announced that she would not be standing at the next general election for family reasons. She gave her valedictory speech in the House of Commons on 5 November 2019. In 2021 it was reported that Blackman-Woods had been subject to an investigation by the Parliamentary Commissioner for Standards. The Commissioner applied no sanctions to Blackman-Woods, who stated there were "strong medical reasons" for the issues that were raised. ==Post-parliamentary career==