Police and Crime Commissioner David Sidwick said: “We would like to thank the local community for their understanding while the police and local agencies put in action plans to disperse the event.
“This has had a significant impact on residents and visitors and the authorities took swift, proportionate action, using powers available to them, as soon as it was possible.
“I would like to thank everyone who was involved in this policing operation, including officers from Dorset Police and elsewhere across the country, who worked together to bring the incident to a safe conclusion.
“We will not tolerate unlicensed music events because of the increased risks they present and the impact they have on our communities and those visiting the area.”