The Princess of Wales took on a new role today as she joined an excitable group of children on a school trip - and befriended one little girl who had no idea she was the future Queen.

Today Kate joined youngsters from All Souls CE Primary Schoolin London on a school mini bus for an outing to the National Portrait Gallery (NPGs), to launch an interactive trail at the venue. The Bobeam Tree Trail, which is based on work by her Royal Foundation for Early Childhood, was created using the Shaping Us Framework, which outlines 30 social and emotional skills that are crucial to living a healthy, happy life at all ages and which the Princess launched on February 1.