Apparently the Permanent Secretary to the Treasury doesn't think so. It includes external numbers the Tories added in after the fact.
https://www.bbc.co.uk/news/articles/cd11m307jjvo
What the permanent secretary had to say about it - before the leaders debate where it was repeated again:
Yet they keep bare-faced lying about it in the press with shit-eating grins on their faces.Thank you for your letter dated 24 May 2024 regarding the presentation of opposition policy costings.
As you will be aware, when costing the policies of opposition parties HM Treasury and the wider Civil Service follow established guidance set out in the directory of the Civil Service guidance. As per this guidance, the costing produced by HM Treasury and the wider civil service are published on the gov.uk website. As you will expect, civil servants were not involved in the production of presentation of the Conservative Party's document 'Labour's Tax Rises' or in the calculation of the total figure used.
In your letter you highlight that the £38bn figure used in the Conservative Party's publication includes costs beyond those provided by the civil service and published online by HM Treasury.
I agree that any costings derived from other sources or produced by other organisations should not be presented as having been produced by the Civil Service.
I have reminded Ministers and advisers that this should be the case.
James Bowler
Permanent Secretary
If they're prepared to lie about that so clearly and openly, what else are they gonna lie about?Earlier Energy Secretary Claire Coutinho told BBC Breakfast the costings had been "signed off by the permanent secretary of the Treasury" and if anything the Tory claim was “an underestimate”.
“These are brilliant independent civil servants and they would not be putting anything dodgy in there," she said.