Assimilated law reform: Moving towards alignment?
The government says it revoked or reformed 40 pieces of assimilated law (derived from EU law) between June and December 2024.

The UK left the EU on 31 January 2020 at 11pm GMT with a ratified Withdrawal Agreement. The changes brought about by Brexit have been implemented predominantly through the EU (Withdrawal) Act 2018 and the EU (Withdrawal Agreement) Act 2020. This briefing paper explains the constitutional and legal implications of those two Acts, taken together, and what it means for the next part of the Brexit process.
Constitutional implications of the Withdrawal Agreement legislation (1 MB , PDF)
The UK ceased to be a Member State of the European Union with the coming into force of the Withdrawal Agreement (WA) on 31 January 2020 at 11pm GMT. That treaty governs the current relationship between the UK and the EU regarding several matters, while negotiations on more permanent arrangements about trade, security and political cooperation are undertaken.
This change in relationship with the European Union has had major domestic and constitutional consequences for the United Kingdom.
This briefing paper explains the changes in domestic law brought about by this new settlement, and their constitutional significance. It focuses especially on the relationship between two Acts of the UK Parliament: the European Union (Withdrawal) Act 2018 (EUWA) and the European Union (Withdrawal Agreement) Act 2020 (WAA). It explains:
The paper also addresses constitutional issues that have resulted from the process of legislating for Brexit itself. Leaving the EU, and legislating for it, have had knock-on effects for:
Constitutional implications of the Withdrawal Agreement legislation (1 MB , PDF)
The government says it revoked or reformed 40 pieces of assimilated law (derived from EU law) between June and December 2024.
A briefing paper which "maps" (or summarises) the main elements of the United Kingdom's uncodified constitution.
An updated briefing paper on oaths of allegiance taken by senior office holders in the UK. This includes the Parliamentary Oath taken by MPs and peers and the judicial oath taken by judges.