Greenpeace journalist Kieron Bryan, from London, has said he fears "losing years of his life" in a Russian jail after being arrested over a protest against oil drilling.
Mr Bryan is one of the "Arctic 30" detained on board their boat the Arctic Sunrise and accused of piracy by Russian authorities.
In a letter to the Sunday Times today he said: "My greatest fear is being kept from my family, my friends and my girlfriend for any great length of time.
"In many ways I'm lucky I don't have children who depend on me, but the fear of losing years of my life and the opportunity to perhaps start a family is terrifying".
Mr Bryan was denied bail in a Russian court earlier this month along with his fellow protestors.
More top news
The 52-year-old had previous convictions for violence but was not on the anti-terror watchlist.
In a statement Charlton Athletic said: Keith was a true hero who will be greatly missed by all the Charlton family and everyone at the club.
London and the worlds has united on Twitter in defiance of the West minster attack #prayforlondon #wearenotafraid