Yuganskneftegaz was seized in part-payment of Yukos's alleged tax arrears in 2004 and subsequently acquired by Rosneft after a rigged auction, won by a dodgy front company.

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The charity's three-point plan also calls for a guarantee that no-one should be evicted for bedroom tax arrears or deemed intentionally homeless if they are evicted for that reason.

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Banco Fator, the investment bank advising the government on the sale, insists that adequate provision has been made for any remaining bad debts, plus any liabilities for staff pensions, tax arrears and other hidden horrors that often come to light when a Brazilian company is sold.

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It said Holyrood had the power to make it impossible to use "bedroom tax" arrears as a reason for eviction.

BBC: Bedroom interior

"What we are calling on is for the Scottish government to change housing law so that if you incur 'bedroom tax' arrears that should be treated as an ordinary debt but not allow you to be evicted, " he suggested.

BBC: 'Bedroom tax' call for action from Holyrood

The problem was that those doing the calculation seemed unaware of how the corporate tax system actually works: in arrears.

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Once property tax is more than a year in arrears it becomes eligible for auction.

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This is paid either in cash or as a credit against future tax liabilities, and is typically paid a year in arrears.

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The Scottish government has rejected Labour's call for emergency legislation to prevent tenants being evicted as a result of arrears caused by the so-called "bedroom tax".

BBC: Bedroom interior

By and large, businesses welcomed this tidying up, even though they will pay more tax during a four-year transition to a new system of payment, under which big firms will pay tax quarterly on a current-year basis, rather than in arrears as now.

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