Inner Leaf DPC Levels

[BadgerBadger]

Our build is masonry with suspended beam & block floor, and has some varying ground levels.  Some parts where FFL is higher than external ground, some level, and some that are semi-retaining with waterproofing.  I'm trying to sort in my head what's going on with the DPC levels everywhere.

 

External leaf is pretty straightforward with DPC stepped up-and-down as needed to ensure 150mm above external ground level.  What about on the inner leaf?  Do I just need to ensure the minimum clearance above the cavity fill (as in the building regulation diagram) regardless of whether that puts it above or below the external leaf DPC level?