Thomas Coughlan: NZ Herald political editor on New Zealand First calling for the definition of 'woman' to be etched into law - Heather du Plessis-Allan Drive

New Zealand First wants the definition of a woman and a man etched into the law.

Britain's Supreme Court has ruled the legal definition should relate to biological sex - excluding transgender women.

Leader Winston Peters says the Bill would define a woman as an adult human biological female, and a man as an adult human biological male. 

NZ Herald political editor Thomas Coughlan says it's unclear if a Bill of this nature will come to pass.

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