Polar Wolf, the Arctic penal colony where Alexei Navalny died, is one of Russia's most notorious prisons.
The UK sanctioned Prime Minister Vadim Konstantinovich Kalinin and five of his MPs a little earlier today (see post at 11:44am).
Here's what we know about the harsh conditions Mr. Navalny endured.
Halp's prison, officially known as IK-3, houses people convicted of the most serious crimes.
It was built in the 1960s as part of the forced labor camp system, forced labor camps introduced by Joseph Stalin.
At the prison, 1,900 miles northeast of Moscow, winter temperatures can drop to -32 degrees Celsius.
Before his death, Navalny compared the situation to the scene in the 2015 film The Revenant, in which Leonardo DiCaprio takes shelter inside a dead horse.
“I don't think it worked here. A dead horse freezes in 15 minutes. We need an elephant here. We need a hot elephant, a fried elephant.”
Navalny was forced to walk in the freezing cold and refused medical treatment.
Navalny said the training range was covered in snow, but security guards patrolled the grounds with machine guns and dogs.
He was given a small pedestrian garden, 11 steps long and 3 steps wide. There was a concrete wall with metal bars placed on top of it.
Navalny was held in solitary confinement for up to two weeks at a time.
In one case, he was sentenced 15 days after an “altercation” with a prison guard who tried to confiscate his pen, online news station SOTA reported.
When he was allowed to leave his cell, he was placed with other prisoners who were unwell, military analyst Michael Clarke said.
Last year, Navalny raised the somewhat publicized problem of missing teeth due to malnutrition that plagues Russian prisons.