Assaults in Bullingdon Prison were on track to hit their highest level on record in 2018, new figures show.
It follows a violent trend across England and Wales’s prisons, where deaths, assaults and self-harm incidents were all at record levels over the nine months.
Last week, the Justice Secretary admitted levels of violence and self-harm in prisons are "unacceptably high", and described numbers showing increases in all the key categories as "disturbing".
By the end of September 2018, 356 assaults had been recorded in Bullingdon Prison.
In the whole of 2017, there were 376 – meaning the number of assaults in 2018 is likely to be the highest since the first published records, for 2004.
Of those assaults to the end of September, 103 were on prison staff. In total, 43 were defined as serious, which include sexual assaults and those where victims required hospital in-patient treatment.
Between January and September 2013, there were 45 assaults, meaning eight times the number were recorded during the same period in 2018.
The numbers also reveal that there were 414 cases of self-harm in Bullingdon in the first nine months of 2018, 13 times the number in the same period in 2013.
Across England and Wales, 325 deaths were recorded in prisons in 2018. They include 92 self-inflicted deaths, up 31% on the previous year.
In Bullingdon, three prisoners died in 2018 – two deaths were recorded as self-inflicted, and one as natural.
Commenting on the national figures, Andrew Neilson, campaigns director for the Howard League for Penal Reform, said: “No one should be so desperate while in the care of the state that they decide to take their own life. It is a national scandal that the number of prisoners losing their lives through suicide has risen again.
“Particularly concerning is the growing number of people, including several men in their twenties, who have died in as yet unexplained circumstances. One cannot begin to imagine the pain this is causing to grieving families who still do not know how or why their loved ones died."
Across prisons in England and Wales, nearly 34,000 assaults were recorded in the year to September 2018, an increase of 20% on the previous 12 months.
Self-harm also increased by 23%, with nearly 53,000 cases in the year to September 2018.
The Justice Secretary, David Gauke, said: "Violence and self-harm in our prisons is unacceptably high and these figures underline why we are spending an extra £70m to fight the drugs plaguing prisons and boost security, while also training over 4,000 new prison officers in handling the complex offender population.
"Clearly there is a huge amount yet to be done but I am determined to cut the violence so prisons can focus on rehabilitating the offenders who will be back out at some point.
"And while these figures are disturbing, I am optimistic that the measures we have been putting in place will help us to reduce violence and ultimately better protect the public."