Shouting and banging could be heard as a security vans left HMP Ranby where a disturbance involving prisoners is ongoing.
A number of vehicles from the GEOAmey prisoner escort and custody company were seen entering the facility.
When they left a short time later banging could be heard on the sides of the vehicles and shouting from inside was heard.
More top news
The former royal marine could be released in as little as two weeks after his sentence was reduced from murder to manslaughter.
The painting of the late singer was auctioned to help raise funds for HIV and Aids prevention and awareness.
Katie Hopkins has accused JK Rowling of living in a "fantasy land" as the two clashed in the aftermath of the Westminster terror attack.