In areas where the devolved administrations and legislatures have competence, such as agriculture, environment and some transport issues, the devolved administrations and legislatures are responsible for implementing the common policy frameworks set by the EU. At EU level, the UK Government represents the whole of the UK’s interests in the process for setting those common frameworks and these also then provide common UK frameworks, including safeguarding the harmonious functioning of the UK’s own single market. When the UK leaves the EU, the powers which the EU currently exercises in relation to the common frameworks will return to the UK, allowing these rules to be set here in the UK by democratically-elected representatives.

High

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

Chapter 4, Paragraph 4.2