There's been an international outcry after a Russian court sentenced Kremlin critic Vladimir Kara-Murza to 25 years in prison for treason, and other charges including spreading "false" information about the Russian army.
Britain's Foreign Secretary James Cleverly said "Russia's lack of commitment to protecting fundamental human rights, including freedom of expression, is alarming.
We continue to urge Russia to adhere to its international obligations including Vladimir Kara-Murza's entitlement to proper healthcare."
Elsewhere, the U.N. High Commissioner for Human Rights Volker Turk said in a statement that the 25-year prison sentence was "another blow to the rule of law and civic space in the Russian Federation."
"No one should be deprived of their liberty for exercising their human rights, and I call on the Russian authorities to release him without delay," Turk said.