Quick answer
For internationally trained physiotherapists, Grade B (350) in each of the four OET sub-tests is accepted for HCPC (UK), AHPRA (Australia), and equivalent regulators. AHPRA's minimum for Writing is Grade C+ (300); Listening, Reading and Speaking stay at Grade B. The OET Writing sub-test tests your ability to summarise functional outcomes and selectively communicate intervention. Most marks are lost on Organisation & Layout — session-by-session narrative rather than outcome-led handover.