Ok, having looked through the pics I seem to have mixed up the Dendroaspis pics
here is the correct close up of the D. jamesonii
This is the full shot where I cut the other c/u from, and I am not sure, but I think this may have been Dispholidus typus green phase, if I look at the yellow one in the left of the frame... not sure, anybody confirm? The head shape still isn't right to me, but I recall the guy saying they were boomslangs, and in the background you can see the vague shape of the Thelotornis capensis they had
apologies for the confusion!