Alarming figures have revealed Feltham Young Offenders' Institute is one of the most dangerous in the country.
The latest government statistics show the institute, in Bedfont Road, reported the second highest number of assaults on staff and recorded the most prisoner-on-prisoner attacks in England and Wales in 2013.
A total of 141 violent assaults on guards and staff took place at the Feltham facility over a period of 12 months – the highest in west London.
During the previous year, the number was slightly less with 112 incidents reported, and the largest number of cases on file stands at 158 which was recorded in 2005.
Elsewhere in west London, Wormwood Scrubs on Du Cane Road, reported 82 cases of staff being attacked by prisoners - joint fourth highest in the country. The figure was down from 102 the previous year.
Thameside prison in Greenwich reported the most violence against its workers in 2013 with 168 assaults on staff.
Cases of staff being assaulted are at their highest level since 2007 with a total of 3,266 incidents in England and Wales in 2013 - nearly nine everyday.
More than 2,200 of these were carried out by men over the age of 21, and some 164 of them were by female prisoners.
Other figures showed there were 624 cases of attacks by inmates against each other at the Feltham prison, which was by far the highest figure, followed by Glen Parva in Leicestershire which had 483.
Wormwood Scrubs recorded 98.