Jailed British-Russian Kremlin critic sent to Siberian ‘punishment cell’

Vladimir Kara-Murza is a Russian opposition activist (Alexander Zemlianichenko/AP)

An imprisoned Russian opposition figure who has dual British nationality has been transferred to a maximum security prison in Siberia and placed in a tiny “punishment cell”, his lawyer has said.

Vladimir Kara-Murza, 42, was convicted of treason earlier this year for publicly denouncing Russia’s war in Ukraine and sentenced to 25 years as part of the Kremlin’s relentless crackdown on critics.