I'm with ANZ Shares and set up for international shares. Before...

I'm with ANZ Shares and set up for international shares. Before I call them and get stuck in an infinite loop, has anyone figured out exactly how to get ANZ to register the change of PM8 CDI's to PRE on LSE? that is to say, I don't want to sell my shares, just have my existing PM8 holding show up in my ANZ Shares system as PRE after 24 February, not right now which would happen with a manual conversion. Does this happen automatically, or do I need to contact ANZ Shares and complete a manual application? TIA