[9] Between 13 June 2007 and 4 July 2007, Mason presented Spinning Yarns, a four-part series on the history of the cotton industry for BBC Radio 4.

[6] Mason announced in February 2016 that he was leaving his position at Channel 4 News in favour of freelancing so he could engage more fully in debates without the constraint of impartiality observed by broadcasters in the UK.

[37] In 2016, Mason distanced himself from his former involvement in far-left Trotskyist politics, by saying that he no longer holds such views and identifies with a "radical social democracy".

I am radical social democrat who favours the creation of a peer-to-peer sector (co-ops, open source etc) alongside the market and the state, as part of a long transition to a post-capitalist economy.

[38]Mason subsequently wrote positively about Marxism: in a piece for New Statesman published in May 2018 for the bicentenary of Marx's birth, he praised Marxist humanism inspired by Marx's Economic and Philosophic Manuscripts of 1844 in general, and the thought of Raya Dunayevskaya in particular, for its emphasis on overcoming alienation from labour in order to achieve individual freedom, whilst criticising the authoritarianism of Stalinism and the structural Marxism of the likes of Louis Althusser.

[39] In another New Statesman article published the following year he described himself as an "actual Marxist", whilst critiquing determinist interpretations of Marx which posit Marxism as a "theory of everything".

[40] In June 2016, Mason supported Labour Party leader Jeremy Corbyn after mass resignations from his cabinet and a leadership challenge.

He wrote in The Guardian: "But one thing I do know: Corbyn is incapable of lying to the British people; he is inured to elite politics; he didn't spend his entire life in a Machiavellian project to gain power and an invitation to Oleg Deripaska's yacht.

"[42][non-primary source needed] In the New Statesman magazine in June 2018, Mason argued the case for state suppression of "fascists", saying that he favoured a policy of using "the full panoply of security measures to deter and monitor" those he described as "racists" and added: "For clarity, unlike many on the left, that means I am in favour of state suppression of fascist groups."

"[46] In May 2022, in a The Spectator podcast, Mason said he was a supporter of Keir Starmer as Labour leader in the aftermath of the Beergate COVID-19 regulations breach allegations.

[47] The same month, Mason was longlisted to be the Labour candidate for the safe seat of Stretford and Urmston in Greater Manchester, succeeding the retiring MP Kate Green.

[48][49] In October 2022, Mason tried for selection for Sheffield Central to replace Labour MP Paul Bloomfield, but here too did not make the shortlist.

[50][51] In March 2023, Mason stated his intention to run for selection for the new seat of Mid & South Pembrokeshire, but did not make the longlist.

[52][53][non-primary sources needed] In February 2024, in The Spectator, Mason wrote that he supported Labour abandoning its £28 billion per year climate change spending commitment, after having studied the Office for Budget Responsibility 2023 financial assessment in the light of interest rate increases, and he no longer thought the "case for borrowing to invest in green energy" was valid.

[54] It was reported in July 2023 that Mason was being considered as a candidate by the Labour Party to run in the constituency of Islington North at the next general election.

[57] In January 2020, Tom Harris and Harvard student Portia Berry-Kilby accused Paul Mason of anti-Catholicism after he tweeted "I don't want Labour's policy on reproductive rights dictated by the Vatican, thanks", in response to comments made by Labour leadership candidate Rebecca Long-Bailey on abortion during a meeting with representatives of the Roman Catholic Diocese of Salford.