Discovery pack gb-politics · pm_speech
Andy Burnham stated in a Commons speech (Sept 2026) that 'The UK economy has taken a 6% hit from the effects of Brexit, according to economists' analysis of internal Bank of England data on thousands of British companies since the referendum a decade ago.'
SourceSteps used: (1) Identified the key factual components of the claim — magnitude (6%), source (economists' analysis), underlying data (internal Bank of England data on thousands of British companies), and timeframe (decade since 2016 referendum). (2) Searched for corroboration in the supplied web evidence, looking for Bank of England studies, Brexit economic-cost estimates near 6%, and retrospective analyses around the 10-year mark. (3) Cross-referenced German-language and English-language coverage of Brexit's economic legacy. (4) Noted that none of the provided sources explicitly cite a 6% figure derived from internal BoE firm-level data, though several confirm a sizeable negative economic impact.
Spiegel's retrospective 'So stark hat der Brexit der Wirtschaft geschadet' (ten years after the EU referendum) confirms substantial economic damage from Brexit over the decade since the referendum.
SourceBundeszentrale für politische Bildung notes trade with the EU was strongly restricted and investment declined after Brexit, with negative economic consequences widely anticipated.
SourceLandeszentrale für politische Bildung Baden-Württemberg dossier confirms UK formally left the EU on 31 January 2020 and exited the single market and customs union on 1 January 2021, with negative economic consequences anticipated.
SourceNone of the supplied web sources cite a specific 6% figure attributed to economists' analysis of internal Bank of England firm-level data. While Bank of England staff have published working papers estimating Brexit costs, the exact methodology and number Burnham describes could not be verified from the retrieved evidence. The figure is therefore not corroborated by independent source families within the available material.
Sueddeutsche Zeitung describes Andy Burnham as the new UK Prime Minister (seventh head of government in ten years), making Brexit a politically central theme in his opening Commons address.
SourceThe directional claim that Brexit has cost the UK economy materially over the past decade is well supported. However, the specific 6% magnitude and the precise provenance (economists' analysis of internal Bank of England data on thousands of British companies) cannot be verified from the supplied sources. Treated as partly true pending corroboration of the precise figure.
Burnham's claim is a classic directional-but-overbroad construction: the qualitative thrust (Brexit hurt the UK economy) is widely accepted in academic and journalistic analysis, but the headline number is presented without a clear citation to a specific study, making it difficult to falsify or fully verify. A robust version of this fact-check would require locating the specific Bank of England working paper or academic study he is referencing.
The claim mixes directionally supported research with specific, unverified detail. Multiple studies and Spiegel's retrospective confirm Brexit has measurably damaged the UK economy roughly a decade on, but the precise '6%' figure attributed to economists' analysis of 'internal Bank of England data on thousands of British companies' could not be corroborated by the supplied web evidence. Bank of England staff working papers on Brexit have produced estimates in a broadly similar range, but the specific methodology Burnham describes (internal BoE data, thousands of firms, exactly 6%) is not verifiable from the sources retrieved. The claim is therefore partly true: the economic-cost framing is supported, but the precise number and provenance are unconfirmed.