Impact of Brexit on CASS and the FCA’s powers and requirements Following the FCA’s decision to leave the EU, the UK government ‘onshored’ and preserved most EU and EU-derived law as it stood immediately before the UK’s departure. ‘Onshoring’ is the process of amending legislation and regulatory requirements so that they work in a UK-only context, including EU legislation that form part of UK law by virtue of the European Union (Withdrawal) Act 2018 (EU(W)A 2018). The EU(W)A 2018, as amended by the European Union (Withdrawal Agreement) Act 2020, made provision for the ratification and implementation in domestic law of the Withdrawal Agreement between the UK and the EU. The Withdrawal Agreement sets out the arrangements for the UK’s withdrawal from the EU. It included a transition period (or, to use the UK government’s phraseology, an ‘implementation period’) beginning on 31 January 2020 and ending on 31 December 2020 (IP completion day). During the implementation period, the UK was treated, for most purposes, as if it were still an EU Member State with access to EU markets on current terms