Stud wall in line with D&D block

[SuperPav]

Appreciate this is a very trivial thing, but how would you tackle the following:

 

We have (in a couple of places) fresh block inner leaf (aerated), which will be dot and dabbed 12mm plasterboard. Where the wall ends (corner), we need to continue in line with it with an internal partition stud wall, but such that the wall is continuous.

 

Where would you put the sole plate of the timber?

 

1) Face aligned with the block work? In which case if you screw PB onto the timber, it would not sit flush with the D&D PB on the block wall. 

2) Face aligned with the block work, but then put PB off cuts or other spacers once the adjacent wall is D&D to pack out the PB from the stud?

3) Or do I bring the timber stud wall out by a nominal e.g. 10mm and then try and get the D&D PB to line up with it? 

 

[markc]

Stud to thickness of wall plus 10-15mm for D&Dv(unless others have a better thickness) then PD stud wall and overshoot onto wall as the starter board