These Regulations are made in part in exercise of the powers conferred by the European Union (Withdrawal) Act 2018 (c. 16) in order to address failures of retained EU law to operate effectively and other deficiencies (in particular section 8(2) (c), (d) and (g)) arising from the withdrawal of the UK from the European Union.
Link: The Marketing of Seeds and Plant Propagating Material (Amendment) (England and Wales) (EU Exit) Regulations 2019
Source: Legislation .gov.uk