The mother of British journalist Kieron Bryan said she hopes "common sense, and a sense of fair play and justice" will prevail.
Speaking as at a silent protest outside the Russian Embassy in London, Ann Bryan said the country has made its point and said her son should be released.
"Punishment should fit the crime and for what happened that day I think they've more than served their punishment," she said.Adding: "I just hope that common sense, and a sense of fair play and justice, will come out of this."
Supporters of British journalist Kieron Bryan have taken part in a silent protest outside the Russian Embassy, in central London, to call for the release of the Greenpeace activist and journalist being detained in Russia .
The videographer and 29 other people were arrested aboard a Greenpeace boat protesting against oil drilling and charged with piracy in September.
The thirty men and women have been moved from a detention centre in Murmansk to prison in St Petersburg
Russia’s Investigative Committee recently announced that the piracy charges would be replaced with charges of hooliganism but they have yet to be lifted.