Three people have been arrested and 22 illegal transmitters seized by Ofcom in the regulator's latest joint police operation against pirate radio stations in London.
Ofcom targeted more than 20 of the estimated 150 pirate broadcasters in the capital in a 10-day operation.
The offices of one pirate studio were raided and warning letters sent to local nightclubs that have advertised on the illegal stations.
Ofcom said the pirate stations interfere with the emergency services, while one local council executive hit out at the stations for "making the lives of our residents hell
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