But Mr Ingram said a report by human rights barrister Nicholas Blake QC, had failed to reach a conclusion with regard to Pte Collinson.

The inconclusive opinion follows a recent inquest into Pte Collinson’s death which returned an open verdict.

His parents James and Yvonne have consistently rejected the Ministry of Defence’s conclusion that he took his own life.

They have accused the MoD of a cover-up and have insisted a full public inquiry would be the only way to finally find the truth.

A total of four soldiers have died at the Deepcut Barracks in recent years, leading to questions over its suitablility as a training base for young recruits.

There had been hopes the report would call for a full inquiry.

But in his Commons statement today, armed forces minister Adam Ingram said he had ruled out such a development.

Mr Ingram told the Commons the Blake report found that, “on the balance of probabilities” the deaths of three young soldiers at the Deepcut barracks were “self inflicted”.

“Mr Blake also concluded there was no evidence any of the trainees were bullied to death,” the armed forces minister said.

As a result, Mr Ingram added, a public inquiry was “not necessary”.

Nevertheless — as expected — the independent inquiry uncovered a “disturbing catalogue of allegations of misconduct”.

Mr Ingram told parliamentarians the Blake review had shown how some trainees at the Deepcut base had suffered “harassment, discrimination and oppressive behaviour”.

The army authorities will now examine the report’s findings to see if any action should be taken for professional misconduct or negligence.

However, Mr Blake did highlight “weaknesses with regard to the appropriate care” of young recruits under the age of 18.

Perth MSP Roseanna Cunningham was shocked to hear of the latest development.

“There are still far too many unanswered questions,” she said. The only possible fair solution is a full public inquiry.”

Private Collinson’s father Jim pledged to continue the fight for a full public inquiry — saying he was devastated by Mr Ingram’s latest refusal.

“I am absolutely gutted and numb with shock,” he told the Evening Telegraph. “As far as we are concerned this just shows up the desperate need for a public inquiry.

“This review was meant to show that there has not been a cover-up but there clearly has been,” Mr Collinson continued.

“I feel the Government is hiding behind these reports and reviews and a full public inquiry will be the only way to find the truth.”

Mr Collinson feels investigations so far have been a “sham”.

“Through all the reports and reviews over the last four years no lessons have been learned,” he continued.

“There has still not been anything meaningful and we have still not got any closure.

“The recent coroner’s inquest returned an open verdict and the need for a public inquiry remains obvious.

“Unfortunately, all the Blake review has done is ensured our campaign for a full inquiry must continue.

“I cannot believe our calls are still being snubbed.”