There is no single figure for how much EU law already forms part of UK law. According to EUR-Lex, the EU’s legal database, there are currently over 12,000 EU regulations in force (this includes amending regulations as well as delegated and implementing regulations). ²  In terms of domestic legislation which implements EU law such as directives, research from the House of Commons Library indicates that there have been around 7,900 statutory instruments which have implemented EU legislation. This figure does not include statutory instruments made by the devolved administrations which will also observe and implement EU obligations in areas within their competence. ³  In addition, research from the House of Commons Library indicates that out of 1,302 UK Acts between 1980 and 2009 (excluding those later repealed), 186 Acts (or 14.3%) incorporated a degree of EU influence. ⁴

High

² EUR-Lex search run on 28 March 2017:

http://eur-lex.europa.eu/search.html?qid=1490700962298&VV=true&DB_TYPE_OF_ACT=allRegulation&DTC=fals...

³ ‘Legislating for Brexit: Statutory Instruments implementing EU law’, House of Commons Library Research Paper 7867, 16 January 2017, page 6, http://researchbriefings.files.parliament.uk/documents/CBP-7867/CBP-7867.pdf

⁴ ‘How much legislation comes from Europe?’, House of Commons Library Research Paper 10/62, 13 October 2010, page 19, http://researchbriefings.files.parliament.uk/documents/RP10-62/RP10-62.pdf

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/604516/Great_repeal_bill_white_paper_accessible.pdf

Chapter 2, Paragraph 2.6