Soviet-era dissident Vladimir Bukovsky went on trial in Britain on December 12 on charges of creating and possessing indecent images of children.
The 73-year-old Bukovsky pleaded not guilty at an initial hearing in 2015.
He held a hunger strike between April 20 and May 16, to protest the charges, which he says he "absolutely denies."
Bukovsky also has appealed to the High Court of Justice in London, saying he is a victim of a smear campaign by Russia's Federal Security Service (FSB).
During the 1960s and 1970s, Bukovsky spent 12 years in Soviet prisons and psychiatric hospitals on charges of spreading anti-Soviet propaganda.
He has lived in Britain since 1976 and is now a fierce critic of Russian President Vladimir Putin.
Bukovsky also has publicly accused the Kremlin of killing former Russian intelligence officer Aleksandr Litvinenko in London with radiation poisoning in 2006.
Based on reporting by AFP and TASS