Report: Mainstream Media Undermined Jeremy Corbyn

Evidence shows former Labour Leader was never given fair coverage despite his policies being popular by the British public.

Leader of the Labour Party speaks to a huge crowd leading up to the General Election where Labour won the largest vote share since 1997. (The Independent, 2017)

As documented in my previous report on media bias in the United States, this was also well documented against another figure who went from being congratulated to being scorned in about three years. Ever since Jeremy Corbyn won the leadership contest in September 2015 there was a concerted effort by the three corporations who owned 90% of the British media to scorn, ridicule, fear monger, and tarnish his public image. While there were other factors like the Blairites of the Labour Party working to undermine Corbyn’s leadership, there were other factors as well. How could a politician who’s policies were very popular among the British public go from friend to foe so quickly? Was there bias in online coverage against Labour Leader Jeremy Corbyn leading up to the General Elections of 2017 and 2019? To find out I used my experience in data analysis.

Based on my previous article about media bias against Presidential Candidate Bernie Sanders in the United States, I used the same methodology for this study. An In These Times study of media bias against individual candidates with positive versus negative mentions was used and a separate study which showed 70% of Facebook users read just the headlines. Another source I used was from the London Bourough University which analyzed three weeks of media coverage of the Conservative and Labour Parties in November 2019 and weighted positive and negative mentions based on circulation.

I analyzed positive and negative connotations in the top ten to twelve news headlines from eight sources: The Daily Mail, The Daily Mirror, The Daily Telegraph, The Guardian, The Independent, Metro, The Sun, and The Times. All of these from March 2019 through April 2020 combined had a monthly reach of 258 million (which include phone, desktop, tablet, and print). Because there wasn’t a monthly reach estimate for the BBC, it was excluded for this study and the Independent was used in it’s place.

I used a scoring system for each candidate to reach wider audiences. Three candidates were analyzed: Jeremy Corbyn, Boris Johnson, Theresa May. Each of them were assigned a value based on the number of positive or negative mentions for each headline. If an article by the Sun read “Don’t Trust Marxist Labour and Jeremy Corbyn” one point went into the negative column under Corbyn. But if an article from the Sun read read “If Boris Johnson wins today a bright future begins” one column went into the positive column under Johnson. I analyzed them leading up to both General Elections.

Because there were less headlines about Jeremy Corbyn and Theresa May leading up to the 2017 General Election the average number of headlines analyzed was in the 9–12 range, adjusted to so both candidate’s positive and negative totals matched up. For the 2019 General Election it was within the 10–12 range. Here are the results:

2017 UK Election

Three weeks before the Election Labour leader Jeremy Corbyn had 56% negative coverage versus 62% positive coverage for Conservative Prime Minister Theresa May.

When the General election campaign began in April all polls indicated an uphill battle for the Labour party. But by mid May, Labour had eroded the Conservative party’s lead from eighteen to nine points. Theresa May experienced positive coverage in light of the Manchester bombing at the Ariana Grande concert. Meanwhile Corbyn, who was campaigning in person around the country, experienced negative coverage. The Sun and the Daily Mail were the most negative towards the opposition leader, while the Guardian and Metro provided the most positive coverage towards him.

While the Labour Party soared in the polls, Corbyn received 64% negative coverage.

Two weeks out the Labour Party under Jeremy Corbyn’s activism was paying off. Labour was surging from double digit deficit to within single digits of overtaking May’s Conservative Party. Despite this success Corbyn over 60% negative coverage. Although Conservative Prime Minister Theresa May also received negative coverage, it was largely due to her party’s sharp U-turn on the dementia tax and not attending the BBC leadership debate. Jeremy Corbyn despite this negative coverage continued to see his party slowly climb in the polls.

One week before the Election and Corbyn still received more negative than positive coverage relative to May.

With one week to go Corbyn’s Labour Party had dramatically closed the gap with May’s Conservative Party in opinion polls. Despite YouGov polls indicating the Labour Party was within single digits of winning many in the media dismissed it, pointing to the shy Tory effect which occurred as recently as 2015. Theresa May was often associated with the dementia tax, the economy, and national security. Corbyn was often associated with terrorism and other white noise.

Overall Coverage leading up to the 2017 General Election in the United Kingdom reveal some interesting statistics. While the incumbent Conservative Theresa May received 52% positive coverage, Opposition Leader Jeremy Corbyn received only 42% positive coverage. While coverage did try to paint Labour leader Jeremy Corbyn as unreasonable and unfit, it backfired. When Channel 4 reporter Jeremy Paxman interviewed Jeremy Corbyn his confrontational style, aggressive manner, and constant interruptions of Jeremy Corbyn played to the Labour leader’s strengths and showed how sane he was. The Labour leader during Paxman’s grilling was calm, reasonable, humorous, and thoughtful. That along with his easy going nature and message of ending austerity resulted in the Labour Party gaining seats for the first time since 1997 and 40% of the vote, the largest since 2001.

2019 Election

Three weeks before the vote Corbyn is approaching 70% negative coverage compared to Johnson who’s coverage is slightly positive @ACBC89

Three weeks before the election Labour leader Jeremy Corbyn was getting nearly 32% positive coverage, in contrast to Conservative leader Boris Johnson who received 52% positive coverage.

Two weeks until the general election there was a persistent negative coverage against Jeremy Corbyn and his negatives would continue to rise. While Corbyn received 70% negative coverage, Johnson received 51% negative coverage. Labour was dogged with negative coverage even from center left sources like the Guardian as claims of anti-Semitism and his stance to remain neutral on Brexit became constant themes. Meanwhile Boris Johnson who threatened to remove Channel 4’s license and tried to avoid an interview with hard journalist Andrew Neil received around neutral coverage.

In the final week three-quarters of the coverage of Jeremy Corbyn was negative versus slightly positive coverage for Boris Johnson @ACBC89

The contrast of the final week before the General Election is very revealing. Opposition Leader Jeremy Corbyn received 76% negative coverage compared to Conservative PM Boris Johnson who received 53% positive coverage. The The Daily Mail, The Daily Telegraph, The Guardian, The Sun, and the Times gave the Labour leader 67% or more in negative coverage in the final week before the vote.

In the three weeks leading up to this election Jeremy Corbyn received less than 29% positive coverage versus over 71% negative coverage. Boris Johnson on the other hand got over 51% positive coverage verses slightly under 49% negative coverage. The Labour leader earned more negative coverage than Bernie Sanders did in the United States during the Democratic primary, indicating an institutional bias against center left candidates in both the UK and the US. This bar graph highlighting the Labour party leader’s negatives almost matches with a report by the London Borough University showing negative coverage weighted by circulation.

Five of the eight sources analyzed covered the Opposition leader very negatively before the 2019 election.
Boris Johnson received largely average to slightly above average positive coverage.

Further research reveals that all among all eight news sources, The Daily Mail, The Times, The Sun, the Daily Telegraph, and The Independent were the most negative, The Daily Mirror and The Guardian were the most favorable towards the Labour Party. For the Prime Minister the Daily Mirror, The Guardian, The Independent, and the Metro were the most negative, the The Daily Telegraph, The Daily Mail, The Sun, and The Times were the most favorable.

Weighted by Monthly Reach

This study focused on the headlines of four conservative, two center-left, and two centrist mainstream news sites that had wide monthly reach in the UK of 258 million. I left out the Daily Express which received a lot of controversy for their coverage in both elections, consequently this means the study is tilted in favor of the Labour party by as much as 2–4%.

Weighted by monthly reach reveals that Jeremy Corbyn received 30.1% positive coverage versus 69.9% negative coverage. In comparison Prime Minister Johnson got 49.9% positive versus 50.1% negative coverage.

Positive and Negative mentions weighted by Monthly Reach of 258 million


This study focused largely on the headlines leading up to the General Election for June 2017 and December 2019. There is a strong correlation between the tone of an article in the headline relative to the tone of an article itself. Because there were more articles written in the 2019 election than the 2017 election, this focuses a little more on the former than the latter. The total number of articles analyzed for the 2017 election was 476, for the 2019 election it was 564.

Out of the 238 articles analyzed between May 18th and June 7th, 2017 Jeremy Corbyn got 58.4% negative coverage versus 41.6% positive coverage. Prime Minister Theresa May received 52.1% positive to 48.9% negative mentions before the vote. Although the coverage for the Conservatives was expected to be slightly positive given they lead by a plurality in the polls, the coverage of Labour was more negative than was expected given Corbyn helped them climb from a double digit deficit to within two points of the Prime Minister’s party.

Out of the 282 articles analyzed between November 21st through December 19th, 2019, Corbyn received 71.3% to 28.7% negative to positive coverage. Prime Minister Boris Johnson got 51.4% to 48.6% positive versus negative mentions. Coverage for the Labour Party was very negative during this period which coincides with a previous study mentioned earlier that the center-left party was covered the most negative out of five parties studied. Boris Johnson on the other hand was viewed positively by the press. Given the fact all eight sources held a monthly reach of 258 million, this played a big role influencing the outcome of both elections.

Loughborough University studied first three weeks of 2019 election and weighed positive and negative mentions relative to circulation.

First time writer for medium. I write about political analysis, race, culture, food, travel, and other interesting topics that I’m passionate about.