The Afghanistan inquiry is investigating alleged war crimes by UK special forces from 2010 to 2013 – as well as claims of a cover-up.

Grenfell, who worked as a mess hand, or kitchen worker, with the SAS at that time, said she had met a soldier who told her about prisoners being abused.

“I specifically recall him telling me that he would put prisoners on a forklift, raise it up and drive very fast so that they fell off,” she said.

Green, who served in Afghanistan between January and September 2012, told the inquiry he was dismissed as a “Taliban-loving apologist” after raising concerns about the killing of three Afghan farmers by the SAS.