NoD, HN39;
It is difficult to be definitive with the available information, but according to those tables that A33Zab posted
here, (table reproduced below) for the A330, the stall warning will occur in Normal Law but not until the Maximum AoA = 23°.
So it is indeed possible to have a stall warning in Normal Law but not until a maximum of 23°, is the way I read the statement beside the "IN NORMAL LAW" qualifier. Perhaps these tables represent the "phase-advanced AoA's" referenced in the AIRPROX AAIB Report.
I don't know whether the A320 stall warning system behaves same way but there is some reason to believe there would be similarities.
I could not determine what the numeric values in the table below Table A meant but in discussion they likely are entry points into Table B. That said, anything "> 200" has no correction from Table B.