Thank you for your reply.
The shares can be traded through Oberon Investments apparently. I asked them how this could be done and they replied:
"IG are yet to get in contact with us regarding the AAA OTC ‘match bargain facility’; on or around the 13th of September, we envision the commencement of trading. I would advise you contact IG and encourage them to open an account with Oberon to enable you to deal."
Could you tell me if this something IG can do?