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This morning the AEC finalised counting for the Farrer by-election with the release of detailed preference data.

It answers what I thought was a key question in the result – whether there was a difference between Liberal and National preference flows to One Nation. It was not possible to answer this question using the previously released full distribution of preferences.

Preference flow data tallies destination preferences from the primary votes for each excluded candidates to one of the final two candidates. In Farrer this data tallies preferences from ten excluded candidates to One Nation’s David Farley and Independent Michelle Milthorpe, the final pairing of candidates. Preference flow data ignores the intermediary stages published as part of the formal distribution of preferences.

The data released today reveals a difference in preference flows by supporters of the two Coalition parties . Liberal voter preference flows to One Nation were 59.0% compared to 69.1% for Nationals voters.

The flow data also reveals that One Nation’s David Farley did not need Liberal preferences to win. In the full distribution of preferences, Farley did not pass 50% until the Liberal candidate was the last excluded. Using the flow data where National preferences do not first flow through the Liberal candidate, Farley reached 50.2% on the flow of National preferences without the need for any Liberal preferences.

The question is whether the different flows tell us anything about how Liberal and National preferences would flow at a general election. In Farrer there was no Labor candidate in the final pairing. I suspect both National and Liberal preference flows to One Nation would have been higher in a final contest involving Labor rather than an Independent.

But it does suggest that Liberal preferences to One Nation will be weaker than those of National candidates. That was the case two decades ago in Queensland before the formation of the LNP. It in part reflects the different appeal of One Nation in rural electorates contested by Nationals versus the flows in urban electorates contested by Liberal candidates. One Nation polled a high enough first preference vote in Farrer for this difference not to matter. But a lower primary vote and weaker Liberal preferences would hamper One Nation hopes of winning urban seats.

Against this view, that the Liberal candidate drew top spot on the ballot paper with Milthorpe in second position suggests that the donkey vote may have played a party in the weaker Liberal preference flows to One Nation.

And it has to be remembered that preference flows from voters on the right of politics have always been weaker than from voters on the left. One Nation and the two Coalition parties rarely achieve the sorts of flows produced by the Greens in Farrer. Despite polling only 2.3% of the vote, Greens preferences flowed 91.8% to Independent Michelle Milthorpe. At general elections, Green voter preferences to Labor are consistently above 85%, a figure that the Liberal and National parties struggle to achieve from their supporters in three cornered contests.

I haven’t had time to pull apart the data by polling place, but the swing to One Nation was smaller in Albury, by far the largest regional centre in the seat. It was also in Albury where Liberal and Milthorpe support was strongest. Farley was better known in the west of the electorate where National support was also strongest. It may be the different preference flows reflect this familiarity with local candidates and the weaker One Nation support in Albury.

There’s more data on the preferences inside the post, along with an effort to graph the preferences data. Read More »2026 – Farrer By-election – Final Count Data Released