There are issues with interpretation, so the CAA drawing could usefully be improved. But in 20 odd years of lfying I have no recollection of an incident in the OH, so the 'big sky' theory applies just as well there as elsewhere. That compares very well with a variety of serious events at various points around the circuit which I recall - although to be fair some of them have been 'radio asisted'.
Crash one - the intention is to loose the height from a point on the runway centreline, inside the finals turn to the runway centreline on the crosswind leg. This will typically give you at least 3 times the runway length to do this - much more if the airfield fly the typical 'transport command' type circuits. But I'll grant the CAA drawing is a bit mixed - compare the ground track to the runway.