The families of those who died in the Clutha helicopter crash in Glasgow have been told the cause cannot be fully established due to the lack of a black box recorder.

At the first of two briefings being given to relatives by the AAIB tonight, it emerged they have been unable to determine exactly what caused the Police Scotland Eurocopter to crash into the Clutha pub, killing all three of those on board and seven others enjoying a night out in the bar.

An interim report showed that the helicopter had suffered double engine failure due to fuel being unable to reach the engines. It’s thought the final report has not been able to conclude why that was the case.

Ian O’Prey, whose son Mark was killed in the crash, said: “The switches weren’t right that control the fuel tanks. There’s nobody to blame, I don’t really want somebody to blame, well, I did for a long time but you begin to calm down.”

The big thing is the flight recorder, that’s the first question I asked them, why are there these things still flying around without a flight recorder.

Mr O’Prey

The full AAIB report will not be published until Friday after all of the victims relatives have been briefed on it’s contents but lawyers representing some of those affected tonight said they have been left with many unanswered questions.

The AAIB are said to have done a thorough job but according to Aviation Expert Jim Morris from Irwin Mitchell their investigation has ‘’hampered’’ by the lack of a black box. Mr Morris also said that it was impossible to rule out whether any human factors had played a part in the crash because of the lack of information available.

Pilot David Trail, PC Tony Collins and OC Kirsty Nelis all died on board the helicopter.

John McGarrigle, Mark O’Prey, Gary Arthur, Colin Gibson, Robert Jenkins, Samuel McGhee and Joe Cusker were all killed in the Clutha bar when the aircraft came down on November the 29th 2013.