Thanks mate. I knew I saw it somewhere. I just couldn't remember where and there were very few occasions for a lull turn at that point in the game (there are quite a few more once the third white die comes into play).
You only have a lull turn if you CHOOSE the doubles as your pair of dice to decide your action points. It is possible to roll and not have a lull turn. (you choose 1 and 6) or you can choose to have a lull by choosing 1 and 1)