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So, the question seems to be: was this a download printed on the Labour Party's printers or not? If it was, then was it presented as the official report?
If it was not and was, in fact, one of the copies available for purchase—for the trifling sum of £70—from the HMSO, then who paid the £70? Was the £70 actually paid to HMSO or were the copies effectively stolen by the Labour Party? Was the £70 paid in the case of the unspecified number of other reports that have been auctioned?