Ann: Tawana Half Year 2018 Accounts, page-9

The last TAW trades were Wednesday.

T+2 = Friday which is the Record Date for A40 shares.

Thus, the earliest you'll know if you have your deferred units to trade is Monday.

Actual shares in A40 (either bought on market or issued via merger scheme) isn't until end of deferred trading which is 14 December off the top of my head.

Edit: but who knows, some brokers may allow you to trade deferred A40 merger shares before the record date. Ask your broker for advice.