A prisoner left a message on the roof of Strangeways during a 12-hour protest.
The inmate climbed up onto the roof and wrote 'FREE IPPZ' in big white letters. He was also heard repeatedly shouting "free IPPs" during the standoff.
His protest seemed to be a related to the now abolished court sanction titled Imprisonment for Public Protection sentences (IPP). The sentences were scrapped back in 2012, however, the abolition wasn't retrospective so some prisoners locked up remain on them.