Well done to all concerned. Not a criticism, but I wonder how much was still missed and might be revealed by a comprehensive Lidar survey.. I've just wiki'd it and it seems the technique is becoming increasingly advanced and at the same time cost effective. I do worry though that Lidar data could fall into the hands of the unscrupulous, not just the work done in the difficult to police Nile and Amazon deltas but globally. Iirc Wessex Archarology use it.