The European Union (Withdrawal Agreement) Act 2020 (c. 1) is an act of the Parliament of the United Kingdom that makes legal provision for ratifying the Brexit Withdrawal Agreement and incorporating it into the domestic law of the United Kingdom. It is the most significant constitutional piece of legislation to be passed by Parliament of the Second Johnson ministry. The Withdrawal Agreement was the result of Brexit negotiations. This act was given Royal Assent on 23 January 2020, nine days before the UK left the European Union.