Labor has claimed victory in its 41st seat, with Emily Hamilton getting over the line in the northern suburbs seat of Joondalup this morning.
Despite a neck-and-neck race against sitting Liberal MP Jan Norberger for the past few days of the count, The West Australian has called the seat for Labor after Ms Hamilton held her lead.
At this point, Labor is 300 votes up against Mr Norberger with more than 85 per cent of the vote counted.
Claiming Joondalup means the new Government will hold a commanding majority over the opposition, with the Liberals set to win as few as 12 seats, and the Nationals five.
The result comes after unlikely Labor victories in other close races in Kingsley, Jandakot and Murray-Wellington, where gaps against Liberal MPs have grown to unbeatable levels.
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The only remaining seat where the result is unknown is Kalgoorlie, where a three-way race between Liberal Kyran O’Donnell, Labor’s Darren Forster and Nationals Tony Crook means a full preference count needs to be held before the result is clear.
The news also came as Mark McGowan unveiled his full list of ministerial and parliamentary secretary appointments.