A NORTH-East prison is at the top of a national league for violent assaults on staff and inmates.

At Castington Young Offenders' Institution, in Northumberland, 92.9 per cent of prisoners have been involved in assaults - 30 per cent more than the second worst, Brinsford, in Wolverhampton.

The figures were revealed yesterday in a report by the Prison Reform Trust which showed the Prison Service had failed to meet 18 of its Key Performance Indicators.

Reform trust workers said the figures at Castington were "frightening", particularly with the Home Office target being nine per cent.

No other North-East prisons featured in the top five of the league tables.

Yesterday's report highlighted the state of the country's prison service.

The author of the league table, Joe Levenson, said: "A worrying number of prisons are overcrowded, unsafe, and provide inadequate purposeful activity for prisoners."

The Prison Service was unavailable for comment