Prison inspectors have produced a report into the safety standards of Lincoln jail, which was published just days after it was saved from the axe.
The authors of the report said staff morale was poor and prisoners' welfare was being place at risk. However, the report did acknowledge speculation over the prison's future which meant some of its problems were outside the prisons direct control.
The jail has been holding 50% more prisoners than it was certified to hold and the report also discovered that a foreign national prisoner has been incarcerated for nine years after the date his sentence originally ended.
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The families say their decision comes after a coroner ruled out naming alleged suspects in evidence.
A bomb squad was called to the address in Derbyshire in the early hours of the morning.
The incident happened in Hereford Close in Birmingham around 9pm on 26th July.