Harrowing footage has revealed the extent of the damage inside the Clutha pub following the devastating disaster in November 2013. 

Videos released by the Crown Office following the conclusion of the Fatal Accident Inquiry (FAI) into the crash provide a distressing insight into the remnants of the venue.

Three crew members of a police helicopter along with seven patrons inside the bar were killed when the aircraft crashed into the roof.

Glasgow Times: Courtesy of Crown OfficeCourtesy of Crown Office

Glasgow Times: Courtesy of Crown OfficeCourtesy of Crown Office

READ MORE: Clutha crash caused by pilot's failure to check fuel pumps, inquiry finds

The footage shows full pint glasses abandoned by revellers as they evacuated the building.

A large hole can be seen in the roof of the building, which collapsed under the force of the helicopter.

Metal beams and bits of debris are seen scattered around the interior of the building, which is coated in dust. 

A second clip from outside the bar shows a crowd of distressed people having evacuated the Clutha bar.

Smoke can also be seen billowing from the roof.

Glasgow Times: Courtesy of Crown OfficeCourtesy of Crown Office

Glasgow Times: The helicopter that crashed into the Clutha barThe helicopter that crashed into the Clutha bar

Glasgow Times: courtesy of Crown Officecourtesy of Crown Office

Earlier today, Sheriff Principal Craig Turnbull released his findings from the investigation into the November 2013 disaster.

The FAI found that the crash was caused by pilot David Traill's failure to ensure at least one of the fuel transfer pump switches was activated.

It found that the crash happened after the helicopter’s engines flamed out sequentially while the helicopter was airborne, as a result of fuel starvation, due to depletion of the contents of the supply tank.

Sheriff Turnbull also said David Traill did not follow the correct procedures in dealing with a low fuel warnings.

In his determination, Sheriff Principal Craig Turnbull said the central issue was why the pilot, Captain David Traill, allowed the supply tanks to deplete to the point that they did when there was more than sufficient usable fuel available to him in the main tank to allow the helicopter to return to its base.

The report found that both the fuel transfer pump switches were in the off position when the low fuel
warnings were triggered.

It said that had one or both of them been switched back on by Captain Traill at that point in time the helicopter would not have crashed, however they were not switched back on.

The Sheriff Principal’s determination found that there was enough time between the first and second engine flame-outs for Captain Traill to have switched on the fuel transfer pumps.