For the british act an human fertilisation and embryology see:

Human Fertilisation and Embryology Act 1990. Online Version 

For the 9th edition of the HFEA's Code of Practice see:

Human Fertilisation and Embryology Authority (2019): Code of Practice. 9th edition, London. Online Version 

To the website of the Human Fertilisation and Embryology Authority (HFEA) and for further information Online Version