As powers are repatriated from the EU, it will be important to ensure that stability and certainty is not compromised, and that the effective functioning of the UK single market is maintained. Examples of where common UK frameworks may be required include where they are necessary to protect the freedom of businesses to operate across the UK single market and to enable the UK to strike free trade deals with third countries. Our guiding principle will be to ensure that no new barriers to living and doing business within our own Union are created as we leave the EU.

High

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

Chapter 4, Paragraph 4.3