Marksman I have always found CMC CFDs follow the market i.e....

Marksman I have always found CMC CFDs follow the market i.e. give you the 2 for 1. But I don't know what will happen with your stop loss. My guess is that TAP will open below 90c and trigger your stop loss. Suggest that you call them before opening and determine if you want/are able to withstand a possible 80c price and pay for the 2 for 1 on the due date. You may be able to cancel your stop loss - or just let it stand and suffer the diluted price.
Rather you than me - but talk to them as soon as you can before the halt ends.