Melanie Onn

In February 2020, Onn was appointed as deputy chief executive of RenewableUK.

On 27 March 2019, she resigned from the Labour front bench for a second time to vote against a second Brexit referendum. Onn voted for Boris Johnson's Brexit withdrawal agreement in Autumn 2019.

Onn is a campaigner to change the law to give greater protection to alleged rape victims. Following the R v Evans case, she said that "going through the victim’s sexual history is much more likely to put people off reporting".

At the 2019 general election, Onn stood for re-election and was one of the many Labour MPs to be defeated. Onn lost her Grimsby seat to Conservative Lia Nici. She won 10,819 votes compared with 18,150 votes for the Conservatives. Although she was expecting to lose, Onn later admitted she did not expect the margin of her loss to be so large - 7,331 votes.

Onn campaigned for Britain to remain in the European Union, despite her constituency voting to leave by one of the largest margins in the country. Following the result, she voted in the House of Commons to trigger Article 50 of the Treaty on European Union, the process by which member states may withdraw from the European Union, stating that it would be ‘wrong’ to attempt to block the outcome of the referendum. In September 2017, she voted against the EU Withdrawal Bill, in line with the Labour party whip.

In March 2018, Onn suggested a change in law in order to classify wolf-whistles and cat-calls as hate crimes.

On 3 July 2017, she returned to the Labour front bench in the position of Shadow Housing Minister.

Onn is an advocate of the renewable energy industry and has worked to promote the industry in Grimsby, which Tom Bawden in a 2016 article in The Independent newspaper described as the 'renewable energy capital of England'.

She was among many shadow ministers from Labour's frontbench to resign in summer 2016 in opposition to Jeremy Corbyn's leadership. She supported Owen Smith in the failed attempt to replace Corbyn in the 2016 Labour leadership election.

On 7 September 2016, Onn introduced a private members' bill to protect workers' rights in British law after Brexit. The bill was scheduled for its second reading in the House of Commons on 13 January 2017, but was successfully filibustered by Conservative members of Parliament.

On 20 July 2015, she abstained from the vote on the second reading of Conservative government's Welfare Reform and Work Bill, which restricted child benefit to the first two children in a family and lowers the benefit cap from £26,000 to £20,000 per household. The bill was voted to the committee stage by 308 to 124 Members of Parliament, despite 48 Labour MPs disobeying the party line of abstention by voting against the bill. At the final third reading, Onn voted against the Welfare Reform and Work Bill along with all Labour MPs.

In September 2015, Onn was appointed Shadow Deputy Leader of the House of Commons, working alongside Shadow Leader Chris Bryant.

Onn was selected as the Labour candidate for Great Grimsby from an all-women shortlist in July 2014, following the announcement that the sitting MP, Austin Mitchell, would retire at the next election. In the 2015 general election, she retained the seat for her party with a majority of 4,540, up from 714 in the previous election.

Onn married Christopher Jenkinson, a regional secretary for the trade union, UNISON, in 2014. They have one son.

Onn worked for 10 years at the Labour Party's head office, becoming the head of the party's Compliance Unit. In 2009, she stood in the European Parliament elections for the Yorkshire and Humber region, placed fifth on Labour's regional list. From 2010, she was a regional organiser for the public sector trade union UNISON.

Melanie Onn (born 19 June 1979) is a British Labour Party politician who served as the Member of Parliament (MP) for Great Grimsby from May 2015 until the dissolution of parliament in November 2019. She previously served as Shadow Deputy Leader of the House of Commons from September 2015 to June 2016 and Shadow Minister for Housing from July 2017 to March 2019. At the 2019 general election, she lost the seat to the Conservative candidate Lia Nici-Townend.

Melanie Onn was born in Grimsby, North East Lincolnshire, England on 19 June 1979. She grew up in the town and lived in two housing estates (Nunsthorpe and Grange). Onn attended Healing School and Franklin College. At the age of 17, after falling out with her aunt, with whom she had been living, Onn sought help from Doorstep, a Grimsby-based charity which provides housing support to young people. She graduated from the University of Middlesex with a degree in politics, international studies, and philosophy.