As you point out, not the first time this has happened either. If you Google a bit, you get the impression that the SAS is making a habit of this, blowing away ISIS executioners from long range. Almost seems like the SAS snipers enjoy their work.
Great story. I'm a little disappointed that the Brits are doing most of the "glory work." Then again our Special Forces tend to kill quietly, in the dark, were never there, and get no recognition. Joe