biscuit74 Your quite right that this was not the environment to be using NVGs. Of course, at present it has not been confirmed that the helicopter crew were on NVGs.
I have flown many hundreds of hours on NVGs, all be it fast jet, down at 250ft. With the amount of lighting in a city centre the NVGs would have been unusable and detrimental to Flight Safety. I don't know if Black Hawk pilots fly with the same helmet as the Apache with all instrument information "Head Up". If not their workload to maintain 200ft or below would have been immense
As I have said previously, the procedures should not have allowed the helicopter to be in that airspace at that time!!!.