* Labour's claim that the majority of non-doms wouldn't pay the full amount is also incorrect - the Treasury's own figures show that the vast majority will choose to pay £25,000 rather than bring all their foreign income onshore.
* Third party experts such as Grant Thornton and the CBI back the Tory position that £25,000 is not a significant amount for most non-domiciles.
* Labour wrongly claim that US citizens will not be able to reduce their US tax. This is also incorrect.
UPDATE: The Treasury's latest attempt to attack Conservative figures has spectacularly backfired tonight. Alistair Darling claims that only 15,000 non-doms have off-shore incomes over £60,000. This is not a figure the Treasury have ever given before. Indeed, on 30th April 2007 Ed Balls answered a question in Parliament saying the Treasury did not have such information.
"Estimates of the tax foregone in the UK as a consequence of the use of the
remittance basis by those not domiciled in the UK are not routinely made.
Information is not held on overseas income and gains that do not give rise to a
tax liability in the UK." (Ed Balls MP, Hansard, 30 Apr 2007, Column 1383W)
As Dawn Primarolo said this is because non-doms are not required to disclose this information: "In general, individuals do not have to inform HMRC of their foreign income or gains unless this is relevant to their UK tax liability." (Dawn Primarolo MP, Hansard, 8 Mar 2007, Column 2220W).
UPDATE: The estimable Ben Brogan is accusing Labour of misusing civil servants...
What strikes me though is the scale of the Labour spin operation tonight, which is designed to turn a "Tories promise you tax cut" story into a "Tories rocked by funding row" tale. I have in my inbox a press release from the Labour Party Press Office, in which Alistair Darling, the Chancellor of the Exchequer, claims: "Today George Osborne made a £3.5 billion tax commitment. Treasury analysis shows it is impossible for him to raise the money he needs to pay for this commitment from his proposals on residence and domicile. Initial costings by the Treasury show that George Osborne's proposal would raise a maximum of £650m, leaving George Osborne at least £2.9 billion short. So George Osborne cannot afford the promises he is making. He cannot afford to cut inheritance tax." The italics are mine, but I look forward to hearing from the Treasury tomorrow why exactly its civil servants and this Government department are doing party political work to undermine another political party's conference.