Police have vowed to "do everything within our power" to prosecute the organisers of illegal raves, after the bank holiday weekend saw thousands descend on unlicensed music events.
Despite new legislation banning gatherings of more than 30 people and the threat of hefty fines, revellers flocked to parties which were then broken up by officers.
Two organisers at an illegal rave in South Wales that attracted an estimated 3,000 people - some of whom were thought to have travelled from elsewhere in the UK - were issued fixed penalty notices for £10,000.
Officers were planning to remain at the scene in Banwen in Neath Port Talbot throughout the night, saying around 1,000 people were still there on Sunday evening.
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