Commsec, page-18

For those like myself who did Option 1 (nothing), I spoke to Computershare AU and my international broker.
My international broker only accepts electronic certificates.

If your international broker is the same, electronic only (they probably all are), then the process I believe is:
1) Wait for Paper certificates by snail mail from the UK registry. Should arrive sometime in March.
2) Once you get them, through the UK registry have them converted from paper to electronic (I think they become CREST shares at that point?)
3) Through the UK registry, get them transferred to your international broker.
You may need to get the details from your broker that will need to be supplied at this step.

This is my understanding, but please do look into the steps yourself, as I've not done this before.
If anyone knows differently please correct me.

I did ask Computershare AU why the UK registry send paper and not just go electronic straight away and they said it was some sort of legal thing. Shrug.