The Aporia · Tories overstate net zero cost by nearly £500bn in apparent spreadsheet error

At the Conservative Party conference in Birmingham, Kemi Badenoch’s policy document, "The Right Way," overestimated the cost of achieving net zero emissions by nearly £500 billion due to a spreadsheet error. This mistake inflated an original estimate from the Climate Change Committee (CCC) of £478 billion to £957 billion and later to £1.4 trillion in the document, doubling the actual costs. The CCC emphasized that their most recent analysis suggests the cost would be around £110 billion, or about £4 billion annually. Carbon Brief identified the error, which may have originated from a think tank report or an article in Spectator without verification.

Written by AI on 2026-10-09, from this article's own text only (the story summary below draws on all the coverage).

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In an apparent spreadsheet error, Kemi Badenoch’s flagship policy document at the Conservative Party conference in Birmingham overestimated the cost of achieving net zero emissions by nearly £500bn. The document justified scrapping the UK's 2050 net zero target set under Theresa May by citing estimates from the Climate Change Committee (CCC) that ranged widely but specifically mentioned a gross economic cost of £1.4tn, reducing to £957bn when savings were factored in. However, the actual CCC report figures total only £478bn, indicating an error due to double-counting on the spreadsheet. This mistake undermines claims about the significant economic costs associated with net zero policies and calls into question the Conservative Party's justification for abandoning their previous climate commitments.

Written for “UK Net Zero Cost Error” on 2026-10-30, grounded in this article and the 0 other(s) covering the same event.

📰 UK Net Zero Cost Error

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Peter Walker Senior political correspondent

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2026-10-09 · assertive framing · Tories overstate net zero cost by nearly £500bn in apparent spreadsheet error

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It cites the Sixth Carbon Budget produced by the CCC, the government’s climate change advisers, saying the report put gross economic costs at £1.4tn, falling to £957bn when savings were taken into account.

framing: assertive · carried by 1 article(s) · first seen 2026-10-09

2026-10-09 · The Guardian

Tories overstate net zero cost by nearly £500bn in apparent spreadsheet error · assertive framing

Kemi Badenoch’s flagship party conference policy document overestimated the cost of net zero by nearly £500bn, seemingly after someone accidentally double-counted figures on a spreadsheet. asserted

someone → overestimate → spreadsheet

The apparent error appears in a chapter on net zero in The Right Way, a 100-page policy document produced for the Conservative conference in Birmingham. asserted

error → appear → Birmingham

Badenoch repeatedly used the phrase in her main speech. asserted

Badenoch → use → speech

Justifying the Conservatives’ decision to scrap the target of the UK reaching net zero emissions by 2050, introduced under Theresa May, the document says that estimates of how much this would cost the economy “have varied enormously”. uncertain

this → justify → economy

It goes on: “In 2020, the Climate Change Committee (CCC) estimated that its route to net zero would cost £957bn.” asserted

route → go → 957bn

savings → cite → account

However, the figures in the report in fact total £478bn, half of what the Tory document said. asserted

document → total → what

The error appears to have arisen because a tally of all the costs in a CCC spreadsheet from the document also included the row showing totals for each individual column, thus doubling it. asserted

tally → appear → it

A CCC spokesperson said: “We don’t recognise this number. asserted

We → say → number

The committee has previously offered to meet with Ms Badenoch and talk her through our advice. asserted

committee → offer → advice

” The committee’s most recent analysis puts the expected cost of achieving net zero by 2050 at about £110bn, or about £4bn a year – 0.2% of GDP. asserted

analysis → put → GDP

The error was spotted by the publication Carbon Brief, which informed the Guardian. asserted

which → spot → Guardian

It is possible the Conservatives copied the figure without checking it. asserted

Conservatives → copy → it

It appears to have been published in a report by the rightwing thinktank the Institute of Economic Affairs and also included in an article in the Spectator. asserted

It → appear → Spectator

The Conservative document says it is intended to be a precise diagnosis of the UK’s problems. asserted

it → say → problems

It is modelled in part on The Right Approach, produced by Margaret Thatcher’s Tory party in 1976, which set out some of the economic ideas later used in the 1979 election. asserted

which → model → election

In a foreword, Badenoch notes that “as an engineer”, she is used to correctly diagnosing issues so they can be addressed. asserted

they → note → issues

A later part of the report says: “To fix a problem we must first have an accurate understanding of what is causing it.” asserted

what → say → it

The Conservatives and Badenoch’s office were contacted for comment. asserted

Conservatives → contact → comment

Tories overstate net zero cost by nearly £500bn in apparent spreadsheet error

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