Original Footage may be found in the following sources:
V1 - Cambrai 1917, Line of Fire, (2002), Cromwell productions
V2 - The Great War, (1964) BBC
Episode 19: BBC The Great War - 19of26 - The Hell Where Youth and Laughter Go - YouTube
30:00 - 30:27 - 4539 rear half filmed reversing, Training Numbers, 257 and 268 are also visible. Presumably in England due to training numbers and lack of inditching rails.
30:53 - 31:26 - 9th Battalion Mk V in a rear area, I28, 9344 and I26 visible with at least two other tanks.
31:26 - 31:31 - At three Mk V with Identification stripes moving forward
31:32 - 31:34 - Tank A2 moving forward
31:35 - 31:40 - A MK I or Mk II moving forward
31:40 - 31:44 - A Mk V moving forward, serial number present but not legible on film
31:45 to 31:58 - Tank A2 moving forward, nose art skull on right of hull in front of the sponson.
31:59 to 32:53 - Interview with 2/Lt Horace Leslie Birks
32:54 - 33:09 - Tank "Mary" advancing with infantry . Large number , possibly ?83 on rear of the hull. Possibly post war feature film footage?
33:34 - 33:36 - Tank A2 moving forward
33:51 - 33:54 - Presumably Mk V Mary again.
33:55 - 34:00 - Tank A2 moving forward, nose art skull on right of hull in front of the sponson.
Imperial War Museum (IWM) videos: LIST INCOMPLETE