Pauline Hanson's One Nation party has announced it will contest the Western Australian byelection in Secret Harbour, triggered by the resignation of a Labor MP. The move introduces a new dynamic to a seat previously held comfortably by Labor.

The byelection offers One Nation an opportunity to test its electoral strength in a suburban seat. Labor's grip on the district had appeared secure, but Hanson's entry suggests a potential shift in local political alignments.

According to reports, the resignation of the Labor MP opened the door for the byelection. No further details on the resignation or the candidate were provided in the available sources.

The contest will gauge voter sentiment ahead of broader state elections. One Nation's performance could signal changes in working-class support, long a Labor stronghold.

The announcement comes amid a busy political week in Australia, with other national stories competing for attention.