This week's edition of Tax weekly highlights includes: (1) HMRC’s Agent Update Issue 122, (2) News Analysis on the FTT’s decision in Winfield, (3) the UT’s decisions in Mainpay, on the deductibility of workers’ expenses, and UBS, relating to a judicial review claim, and (4) the Supreme Court granting the taxpayer permission to appeal in The Prudential Assurance Company Ltd.