I do know that Braddon is in the immediate vicinity of the cliff's edge, with a wonderful sea-view. That is one area where CGI want to market their product.
I'll also go a step further, and suggest that the proposed WW memorial (unrelated to CGI with all I's dotted and T's crossed to the satisfaction of Paul S), if on the descending slope of the Grand Shaft Barracks area directly overlooking the sea, can ONLY be on the cliff's edge, and can ONLY be defined as being ON the White Cliffs of Dover.
In fact, because that area slopes downwards directly overlooking the sea, it IS on the cliff's edge, technically, geographically and geo-physically and whatever else one can use to describe a cliff top.
