Just transferring this conversation from the shout box.
Can TAS work with BT active?
In my understanding BT acts as a protection from capture and prevents Unholy Writ.
Original ruling from Gabe (in the shout box) is that TAS would not work with BT active. Not sure where The Gaurdian found it but he came across a similar ruling from Byron.
Redoubter and Drrek have both stated that TAS can not be protected from itself.