Neutral Bay state by-election, 1945

A by-election was held for the New South Wales Legislative Assembly seat of Neutral Bay on Saturday, 15 December 1945.

It was triggered by the death of the Leader of the New South Wales Liberal Party and Leader of the Opposition, The Hon. Reginald Weaver, who died a week after suffering a mild heart attack in the Legislative Assembly chamber.

The seat was subsequently won by barrister Ivan Black of the Liberal Party of Australia. Neutral Bay being a safe Liberal seat, the Labor Party chose not to field a candidate.

The seat of Vaucluse, a safe Liberal seat, was held since 1927 by Reginald Weaver, who served as a Minister of the Crown in the Bavin and Stevens Governments. In 1937, Weaver was elected as the Speaker of the New South Wales Legislative Assembly, serving until the United Australia Party under Alexander Mair lost the election.

The UAP disintegrated in 1943. A large number of former UAP members then formed the Democratic Party in New South Wales, led by Mair, who became Opposition Leader, while others moved into the Commonwealth Party and the Liberal Democratic Party. The Democratic Party then merged with the Commonwealth Party in January 1944. With the conservative vote split in half, Mair had little chance, and resigned as Democratic Party Leader on 10 February 1944, to be replaced by Weaver, who then became Party Leader and Leader of the Opposition.

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