In 2018, the FSA ran a public consultation on the subject with three potential scenarios. Based on responses, the agency went ahead with one of them. Manufacturing of pet food from ingredients fit for human consumption that contain products of animal origin (POAO) is permitted with the same equipment and rooms used for food for humans.
In December 2020, the FSA published guidance for food businesses and enforcement agencies in England, Wales and Northern Ireland. It also committed to review the document before December 2021.
Check the full text of the documents (in English), click on the Link