Britain on Friday sanctioned a Russian judge and four others linked to the arrest of British-Russian Kremlin critic Vladimir Kara-Murza who was jailed for 25 years this week.
"Russia's treatment and conviction of Vladimir Kara-Murza once again demonstrates its utter contempt for basic human rights," British foreign minister James Cleverly said.
"The UK will continue to support Mr Kara-Murza and his family. I call on Russia to release him immediately and unconditionally."
