Kellie-Jay Keen-Minshull (AKA Posie Parker) is a British anti-trans activist best known for her t-shirts and stickers bearing the words “woman: adult human female”. Keen-Minshull is a leading voice in the anti-trans movement in the UK and overseas. 

She has found support from the far right, which also targets trans people. Keen-Minshull has posted anti-Muslim tweets and expressed support for Tommy Robinson. She has appeared on the livestreams of conspiracy theorist Richie Allen’s channel twice and been interviewed by Laurence Fox, and also frequently appears on GB News and TalkTV. Far-right activists have also supported her at her rallies. 

Keen-Minshull registered the Party of Women as a gender-critical political party in February 2024. The party stood 16 candidates in the general election, including 16 candidates in Bristol Central. She lost her deposit with 0.5% (196 votes). The Party of Women has one local councillor, Vanessa Bell who sits on Maldon District Council. Mandy Clare – who sits on Cheshire West and Chester Council – defected to the party from Labour in March 2024, but left in July 2024 before joining Reform UK in March 2025.

In August 2024, Keen-Minshull appeared to express support for the National Front because it historically campaigned against a paedophile group. Several months later, she reposted – and then deleted – an altered version of the Fourteen Words white supremacist slogan.