Rachel isn't answering. She switches the torch to the hand nearest Jo - which goes unnoticed while the rifle is being adjusted. If she has to drop the thing to morph, it's not going to be Rachel having a problem with light.

As they edge forward, the torchlight falls on more stones, more stones - another archway. The little room it frames is without torch, but with the light Rachel holds, there is a small piece of furniture in the corner, dark wood incongruous with all the stone.