Prime Minister blames Labour Party's administrative wing for sex scandal mishandling

President Nigel Haworth has resigned today - after Jacinda Ardern finally saw a victim's written complaint, sent to the party several months ago.

Ardern says the party was ill equipped to handle sexual allegations.

She says despite the best intentions of the party to put a thorough process in place that they thought was supporting victims, it instead caused them harm.

Ardern has apologised to the victims.