Judith Collins says she'll agree to disagree with her party's youth wing on almost everything, including the ban on conversion therapy.

A bill that would outlaw the practice has passed its first reading in Parliament.

National voted against the bill, despite pleas from the Young Nats for the party to support it at first reading and seek changes at select committee.

Collins told Kate Hawkesby  the party won't be dictated by its youth wing.

“The National Party caucus if often offside with our youth wing on various issues. They’re are far more progressive culturally and socially, than the majority of MPs.”

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