A reader of this blog has spotted a second figure carrying a walkie-talkie in footage from the alleged 26 August 2013 incendiary attack reported by the BBC.
The white-clad male  appears from 3 to 6 seconds in this video, striding in the direction of the school in Urm Al-Kubra, Aleppo allegedly struck by an incendiary bomb dropped by a Syrian fighter jet. The ambulance in shot is transporting a female alleged victim of the attack to nearby Atareb Hospital. 
The same man is glimpsed later in the same video among a group of men standing outside Atareb Hospital.
Another figure using a walkie-talkie appeared in the BBC Panorama programme Saving Syria’s Children (at 35:52), broadcast on 30 September 2013. In other sequences filmed by the BBC at Atareb Hospital this man can be seen carrying a camera. The editor of Saving Syria’s Children, Tom Giles, has stated that he has “no idea” who this man is.
In other video shot at Atareb Hospital on the same day a male wearing a microphone headset is briefly glimpsed. His military attire is of a piece with that of the two men who accompany the female alleged victim referred to above from Urm Al-Kubra to Atareb.
Who are these three men? Who were they in communication with? What was their role in the alleged events of 26 August 2013?
Update: my reader has discovered several further instances of walkie-talkie use in Saving Syria’s Children:
Note on above image: a few seconds later in this sequence from Saving Syria’s Children (33:03) the man in the grey shirt appears to have passed the walkie-talkie to another male in a white cap who walks up behind him in the corridor. The man in the white cap then walks out into the courtyard holding the walkie-talkie (34:01) and can be seen speaking into it (34:07), with the man in the grey shirt standing close by at the hospital gate.
Update: one more…
 As discussed here, while the woman boards the ambulance by its stepped side entrance calmly and unaided, upon her arrival at Atareb Hospital 13km away she is filmed by the BBC being stretchered out of the tailgate by five men (two of whom were aware that she had required no assistance just a short time earlier), apparently screaming in agony.