On 21 April 2021, the Financial Markets Law Committee (FMLC) published its letter to HM Treasury regarding the UK joining the International Platform on Sustainable Finance. In the letter the FMLC draws attention to the risk of uncertainty due to divergence which may arise between sustainable finance standards adopted in the EU and the UK after Brexit. In particular considering the complexity of the existing regulatory backdrop and the challenges that firms are facing with respect to disclosure/compliance requirements, the FMLC urges HM Treasury to provide clarity on the approach it intends to take towards the Sustainable Finance Disclosure Regulation and other pieces of sustainable finance related legislation post Brexit.