A final police report into the deaths of four soldiers at the Deepcut Army Barracks in Surrey is to be issued to their families on Wednesday.
The four recruits' families do not believe they committed suicide
Geoff Gray, from Durham, Sean Benton, from Hastings, James Collinson, from Perth and Cheryl James, from Llangollen, north Wales, died at Deepcut between 1995 and 2002.
Their families have refused to believe the soldiers committed suicide.
It is Surrey Police's fifth and final report and is said to be "damning" of the Army and Ministry of Defence.
An embargoed copy of the report is to be given to the families a day before it is officially published on Thursday.
Geoff Gray, father of one of the recruits to die, said: "This report looks at the big picture.
"What we have been told is that it is going to be very damning of the MoD and Army."
An MoD spokesman said: "We will consider carefully any new recommendations when Surrey Police publish their report.
"We have said all along that every one of our young people is enormously important."
The four privates, aged between 17 and 20, died from gunshot wounds at the Princess Royal Barracks.
In September 2003, Surrey Police said they had concluded there were no grounds for a criminal prosecution over the deaths.
But they also found there were failings in the way the Army deals with vulnerable recruits.
They also said there were failings in the way the Army and police investigate the deaths of soldiers.
The families of the dead soldiers have campaigned for a public inquiry into the deaths.