Incredible pictures show British special forces waging secret war against jihadis in Syria for the first time

They are pictured on board Al-Thalab patrol vehicles - a small but versatile combat car ideal for the fluid and harsh desert warfare environment.

Manufactured in Jordan, the five-speed Al-Thalab has a V8 turbo-charged engine and weighs up to 4,800kg.

The pictures show the troops - some of which are thought to be SAS - are armed with anti-tank weapons and 12.7mm Browning machine guns.

They mark the first photographic evidence of Special Forces operations inside the war-torn country.

Although it was widely known they were carrying out clandestine work against ISIS, such operations are not discussed publicly by the Government.

Both the US and Britain are helping support moderate rebels in their war against ISIS.

When contacted by the BBC, a spokesperson for the New Syrian Army refused to comment on the pictures.

However, they acknowledged British logistical support.

"We are receiving special forces training from our British and American partners," the spokesperson said. "We're also getting weapons and equipment from the Pentagon as well as complete air support."

The photographs were taken at the New Syrian Army stronghold located al-Tanf border crossing.

It is a strategic site for the Western-backed group as it is the southernmost crossing with Iraq and is located near Jordan.

It has been the site of heavy fighting in recent months, including ISIS offensives and rebel-counter offensives.

The British Government is carrying out airstrikes on ISIS targets in Syria and Iraq, but aside from its covert operations seen here, has ruled out a ground troops war.

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