My father was party to some SAS activities way back in the 60's, but not a million miles away from Iraq. They would spend weeks in a town or city, and blend in with the population, speak the language and look the part. These two are wearing trousers and t-shirts, not exactly what the locals tend to wear. I don't think they are SAS, at least if they are not on a long term operation.
But the article said they were wearing Arab dress when they were picked up.
But having said that, the guy on the Warrior does appear to be wearing a t-shirt, so what do i know ? Any dicussion as to their identity or reason for being there is speculation at best at this time.