HM Prison Oxford explained

HM Prison Oxford was a prison in Oxford Castle from 1888 until 1996. The castle had been used as a prison since the seventeenth century, but it only acquired the name HM Prison Oxford in the 1888 prison reforms.

In August 1972, prisoners staged a rooftop protest^[1] as part of the prison strike organised by Preservation of the Rights of Prisoners.^[2]

Notes and References

1. Web site: Oxford Castle celebrates history 20 years since HM Prison closed. 9 September 2016. Oxford Mail. 19 September 2019.
2. Book: Fitzgerald. Mike. Prisoners in revolt: the origin and development of Preservation of the Rights of Prisoners (PROP), the British Prisoners Union.. 1976. University of Leicester. Leicester.