In 2005, the UK prohibited the use of Teflon in cookware goods that included perfluorooctanoic acid (PFOA), and PFOA was outlawed internationally in 2019. Exposure to PFOA increases the risk of cancer and other diseases as well as probable infertility. Teflon and other non-stick cookware items produced in the UK after 2005 are free of PFOA.
Teflon was banned in the United kingdom in 2005 because it is a carcinogen and toxic.
https://www.theguardian.com/commentisfree/2020/dec/17/dark-waters-pfas-ticking-chemical-time-bomb-in-your-blood