This week's edition of Corporate weekly highlights includes the latest developments on Brexit, including the Royal Assent of the European Union (Withdrawal Agreement) Act 2020, final preparations for exit day and the European Commission’s Brexit Q&As, as well as guidance from the Competition and Markets Authority on how Brexit will affect its powers and processes. It also looks at a recent case, Russell v Cartwright and others, on whether fiduciary duties or obligations of good faith were found or implied between parties in a joint venture and a Quoted Companies Alliance survey showing investor concerns over de-equitisation.