"Where, pursuant to a legal right, a trader receives from another person, compensation for the trader's failure to receive a sum of money which, if it had been received, would have been credited to the amount of profits (if any) arising in any year from the trade carried on by him at the time when the compensation is so received, the compensation is to be treated for income tax purposes in the same way as that sum of money would have been treated if it had been received instead of the compensation.The rule is applicable whatever the source of the legal right of the trader to recover the compensation.