as mentioned in the update post you have to use the teleport orb to get to the sleeping chambers for treys yellow ! to appear and start the quest
Yes, it did and I did not use the orb because I was in the throne so I went there on foot, even done it again this morning. But thanks to your help i.e. telling me to read the brief, I have now started the mission. Thanks for ending my frustration, I promise to read more carefully in future, cheers.