Plaid Cymru leader Leanne Wood insists her plan for a not-for-profit company to take on the big energy firms is fully costed and would be cheap to set up.
She unveiled a raft of policy ideas at the party's annual conference in Aberystwyth.
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Fire crews have been responding to reports of flash flooding in Carmarthenshire. Some homes have been affected.
Medication designed for animals was taken from the building in Abertillery on Thursday night.
More than a thousand riders will be taking part in a series of events in and around the town.