On further investigation I'd say a 'NOT UNDERGROUND' ticket is not valid on DLR▸ .
For the simple reason that there are, to the best of my knowledge, no inter-available routes on DLR services where a 'NOT UNDERGROUND' fare is offered.
Did you have a particular origin and destination in mind MarkyMarkD?
Not particularly - just interested! And thanks for the welcome.
So, for the avoidance of doubt (once again) do National Rail tickets which permit a cross-London transfer allow this via DLR as well as via Underground? I guess the answer is yes?