Is there one moment that sums up why she has given her life to this? “It was in the Wye Valley, where we were on a fantastic camp,” she answers without a pause. “I will never forget watching one girl trying to climb up a rock. I was so touched by the way the others were trying to support her, shouting up that she could do it, at the same time as being careful that they were not pushing her too far. She did achieve it, and I could see she was trembling on top of that rock, feeling on top of the world.”