From The Daily Wire:

The mission had only been partially successful because the base was destroyed, but the SAS were after a “high-value target” and he had escaped into the tunnels. It was pretty clear none of the Afghan commandos was going to go in after him so he volunteered. There wasn’t enough room to use a long-barreled weapon so the Brit used his Glock 9mm pistol and grabbed a claw hammer. He couldn’t see the Taliban but he could hear and smell them. He shot three of them dead one after the other but then his pistol jammed. He fought two more in the dark where the tunnel opened into a larger room that was partially lit by a candle. After he killed those two, he was attacked by another but killed him almost instantly with a single blow.