By Alistair MacDonald and Sara Schaefer Muoz

The U.S. bankruptcy-court examiner's report into the collapse of Lehman Brothers Holdings may have kicked off a Transatlantic kerfuffle over whether an attempt to buy Lehman Brothers by Britain's Barclays was torpedoed by U.K. regulators.

Buried within the report is a submission from the Financial Services Authority that contradicts the account of the September weekend when Lehman went down given in former Treasury Secretary Hank Paulson's new book, "On the Brink: Inside the Race to Stop the Collapse of the Global Financial System."

According to Paulson's book, on Sunday, Sept. 13, 2008, the FSA and the U.K. Treasury unexpectedly rejected a proposed Barclays deal that would have saved Lehman's from bankruptcy. "'The British screwed us,' I blurted out," Paulson recounts having told assembled bank CEOs.

In the book, Paulson says that Sunday was the first he heard that the FSA wouldn't support a Barclays deal. In a detailed account of the back and forth between itself, U.S. and U.K. authorities and Barclays, the FSA repeatedly states that Barclays didn't put a deal before it to torpedo.