UK Supreme Court rules legal definition of a woman is based on biological sex
www.bbc.co.uk
Judges say the "concept of sex is binary" while adding that transgender people will still have protection against discrimination.

… in the context of the 2010 Equalities Act.

Personal note:

This is a dangerous precedent that is already being used to justify banning trans women from women’s bathrooms, and will likely allow male police / security to manhandle women to ascertain their gender. It will also put trans women at a further disadvantage for getting jobs, as if there wasn’t enough stigma as is.

Get ready for the genital inspectors, more transpotting (like with that non-trans lady in the Olympics) and an increased amount of abuse of trans people.