According to the witnesses, British soldiers placed Afghan detainees on forklifts, raised them into the air and drove at speed so they would fall off for entertainment.
The inquiry, established by the UK Ministry of Defence, is examining allegations of war crimes committed by British special forces in Afghanistan between 2010 and 2013, as well as subsequent attempts to conceal the alleged offences.
Monica Grenfell, who worked as a kitchen assistant and storekeeper alongside British special forces, told the inquiry that soldiers threw detainees from forklifts for amusement.
She said she remembered one soldier proudly describing how detainees were placed on a forklift, lifted into the air and then dropped by driving the vehicle quickly.
Grenfell compared the atmosphere within the unit to one in which soldiers had been “let off the leash”, adding that she felt there was no meaningful oversight of their conduct.
Christopher Green, a former British Army reservist who served between January and September 2012, was the second whistleblower to give evidence. He spoke about the killing of three farmer brothers in a village in Helmand province.
Green said his unit’s intelligence team was certain the three brothers were ordinary farmers and that there was no evidence they were Taliban commanders.
He added that when he tried to raise concerns about the killings with a liaison officer, he was met with hostility and accused of supporting the Taliban. He also said he was denied access to video footage of the operation.
According to Green, after the brothers were killed, the British government paid their mother £3,634 in financial assistance, which he said amounted to an acknowledgement that innocent civilians had been killed.
Responding to the allegations, a spokesperson for the UK Ministry of Defence said the government remained fully committed to supporting the independent Afghanistan Inquiry and thanked all current and former defence personnel who had provided evidence.