Miles vows Queensland households will always have cheapest power in mainland national electricity market if Labor wins

Premier promises to create energy price guarantee' if his party retains government at state election

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Queensland's premier, Steven Miles, will promise his state's households they will always have the cheapest power prices of all mainland states in the national electricity market if Labor is elected this month.

Miles announced on Wednesday that he would set up a second state-owned power retailer, akin to Ergon, which operates in regional Queensland.

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