Jailed Alexey Navalny told a Moscow court of “freezing” conditions inside his prison, as he appeared via video link to outline his case against the authorities at the Siberian penal colony in which he is being held.

Addressing the Supreme Court in Moscow, the opposition figure described the harsh conditions he is enduring in Artic prison, where he was transferred to last month, alleging freezing temperatures and a 10-minute limit on eating food.

"It is impossible to eat in 10 minutes,” he told the supreme court judge in Moscow. “If you eat every day within 10 minutes, then this meal turns into a rather complex process.”