One of the masterminds of the "freedom convoy", Tamara Lich, will remain in prison for at least another week after a judge refused her parole for the second time in four days on Friday.

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Facing multiple charges, Ms Lich, who was on parole awaiting trial, met co-defendant and fellow anti-vaccine movement figurehead Tom Marazzo at a gala Justice Center for Constitutional Freedom on June 16, even though it was strictly forbidden to do so.

Following this event, a Canada-wide warrant was issued and Ms. Lich was arrested on June 27 in her hometown of Medicine Hat, Alberta, for breaching her release conditions. She has been behind bars since that date.

Ms. Lich's camp argued in the Ontario Court of Justice in Ottawa on Friday that her interaction with Mr. Marazzo was legitimate because their respective lawyers were on the scene that evening and the exchanges were brief.

The argument was not enough to convince Judge Paul Harris.

"Your detention is necessary in order to maintain confidence in the administration of justice," he said.

The prosecutor in the file used a photo and a video captured during the gala to argue that Tamara Lich had broken her conditions of release.

Ms Lich had been released from prison in March, a few weeks after her arrest. She is notably accused of mischief and of having obstructed the work of the police, in addition to having encouraged others to do the same.

Judge Harris added to this list a charge for violating the rules of his release.

Tamara Lich will return to court next Thursday, July 14, where she can reapply for parole.

A handful of members of the public showed up at the Ottawa courthouse to show moral support.