Police have been clamping down on unlicensed music events (UMEs) where hundreds of revellers have been congregating for Halloween.

Ten large speakers and other sound system equipment were seized from an unlicensed event organised in Newham in the early hours of Sunday (October 29).

Police found around 200 people at a disused office block, who were cleared from the area.

This followed another event where “several hundred people” were turned away from Harrow, north west London, on Saturday (October 29).

Officers received complaints about large groups of young people in the area, with more heading on their way to the party by public transport.

Around 150 people were found at a large industrial unit and large sound systems and nitrous oxide canisters were seized.

The Metropolitan Police said that hundreds of more people were spoken to and turned away from the event.

Similarly, a smaller event took place in Haringey, north London, at an industrial unit where around 50 people were found inside and “many still arriving”.

Superintendent Jack May-Robinson, responsible for policing London across Halloween and Bonfire Night, said: “Ahead of the Halloween and Bonfire Night celebrations, officers will continue to follow intelligence and lead proactive action against those that we believe to be hosting UMEs and causing anti-social behaviour.

“These events are illegal, cause huge disruption to local residents and can be dangerous environments for those attending as they are unlicensed.

“I urge anyone with any concerns to contact police so that we can interrupt these UMEs before they escalate.”