The battle-hardened captain used the tool as the crazed extremist ran towards a group of British soldiers in eastern Afghanistan, the Star reported.
Using the implement, he managed to decapitate the terrorist with one lethal blow.
He then picked up the dead man’s gun and used it to take out even more militants.
According to the paper, the epic battle took place six weeks ago.
The team had been ambushed as they met with ex-Taliban members fighting on the side of the Afghan government.
vCard.red is a free platform for creating a mobile-friendly digital business cards. You can easily create a vCard and generate a QR code for it, allowing others to scan and save your contact details instantly.
The platform allows you to display contact information, social media links, services, and products all in one shareable link. Optional features include appointment scheduling, WhatsApp-based storefronts, media galleries, and custom design options.
A source said: “The SAS thought they had seen their last day.
“They made a pact that they wouldn’t be taken alive and vowed to fight to the death.
“Capture would mean torture and a filmed execution and they weren’t prepared to let that happen.
“They made every bullet count and when they ran low on ammo they waited for the jihadis to get close enough so they could be killed with grenades or using rifles as clubs.
“That was when one of the SAS managed to kill a man with a spade.”
With the outlook appearing bleak, the heroic soldiers were saved when two US Apache gunships flew in, sending the extremists fleeing.
ISIS are on the run in the Middle East after a concerted campaign by domestic and allied forces.
Backed by intensive US air strikes, Afghan soldiers have claimed growing success against the Taliban and other militant groups, including Islamic State.
However, attacks on civilian targets have continued, causing heavy casualties.