At midnight on the December 31, 2020, the U.K. left the E.U., having secured a Free Trade Agreement (“F.T.A.”). The farewell headline grabber in the drawn-out departure process relates to D.A.C. 6, the Mandatory Disclosure Reporting (“M.D.R.”) rule that applies to Intermediaries. Beginning in 2021, the only reporting that will be required in the U.K. will involve the Category D Hallmark. It applies to fact patterns that are designed to hide ownership. Here, reporting will be required to maintain the integrity of the O.E.C.D. M.D.R. Gary Ashford, a Partner (non-lawyer) of Harbottle and Lewis L.L.P., London, explains the Category D Hallmark and the ongoing reporting requirements that apply to U.K.-based intermediaries after Brexit.