Oxford University today won an extension of its existing injunction against animal rights activists.
Mr Justice Holland's ruling was the latest round in the battle over the new £20m biomedical research laboratory site in South Parks Road.
The judge, sitting at London's High Court, agreed that the present exclusion zone was too small and should be "moderately" increased in size.
He also banned the use of megaphones during the weekly demonstration on Thursday.
The judge said the actual or threatened activities of extremists constituted a "serious ongoing problem" for the university.
The original injunction allowed a demonstration opposite the site each Thursday afternoon, but otherwise banned all protest activities, including the use of amplified noise or cameras, within a designated exclusion zone.
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