"People have had enough and as was showed at the People's Assembly on Saturday when over 4,000 trade unionists, anti cuts campaigners, pensioners, students, etc came together in London to call for action against government policies, we are now prepared to take the next step to demonstrate we are determined to force the UK government to change tack."
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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.