Hampshire Police said it had deployed officers to "support our partners in the event of an emergency at sea", including the Maritime and Coastguard Agency, RNLI, and Border Security Command.

The force imposed conditions under the Public Order Act, as well as powers prohibiting the wearing of face coverings.

A small number of officers were treated at the scene for injuries, but no-one in attendance was seriously injured, police said.

Assistant Chief Constable Simon Dodds said: "Violence and criminal damage have no part in peaceful protest.

"Our position on this has been clear that we will investigate thoroughly and take robust action against anyone responsible.

"Last night saw a number of incidents that were clearly not peaceful protest, rather violent public disorder, and this will not be tolerated as we work to keep our wider communities in Hampshire and on the Isle of Wight safe."

He said officers "did not deserve to be assaulted as they worked incredibly diligently" to ensure the "safety of everyone in the area".

"Neither do they, or anyone from our partner agencies, deserve to be singled out online or subjected to abuse via social media," he said.

"We will work with our colleagues across policing to address any online threats that are made.

"We will continue to review body-worn video footage and videos posted online to identify any further offences and may make further arrests in due course in required".