Mr Dawson said: "We say he is a senior member of that group because that group publishes media on things like Facebook and within that media are videos of members of that group in a training camp for example, driving in a convoy in military vehicles with anti-aircraft weapons and heavy machine-guns.
"There is one video demonstrating the finding of severed heads on the battlefield and decapitated heads. We say Mr Khawaja is Abu Daigham al-Britani and has appeared in many of those videos."
The court was shown three photographs from Khawaja's phone that allegedly reflected what Bhatti knew about his activities. The images showed Kawaja in combat gear sitting on a tank clutching a rifle, wearing clothing similar to other members of a known terrorist group and holding an assault rifle at a terrorist training camp.
Khawaja last month admitted preparation of terrorist acts as well as attending a terrorism training camp. He also admitted receiving weapons training and possessing a firearm for terrorist use.
Father-of-seven Bhatti also faces jail having pleaded guilty yesterday/on Tuesday to assisting an offender. He was alleged to have helped Khawaja by agreeing to provide a replacement phone, funding the purchase of a Kalashnikov assault rifle, using coded messages and helping him avoid arrest by hiring a car to pick him up from Sofia.
A third suspect Asim Ali, 33, also admitted entering into a funding arrangement for the purposes of terrorism by giving £300 to Khawaja. One further charge of preparing acts of terrorism was left on the file after he entered the plea in December 2014.
All three will be sentenced next month.
- The Independent