By Rosaleen Fenton & Emma Mackenzie When Kate, the Princess of Wales announced her cancer diagnosis, she spoke directly to the nation in a moving video message, quickly sending shockwaves around the world. Sitting on a park bench in the gardens at Windsor, dressed casually in a striped jumper and jeans, the senior royal admitted her ‘shock’ at the news, and revealed how she’d carefully explained it to her three young children, “in a way that is appropriate for them”. The decision to film outside was possibly a poignant one for the mum-of-three – with spring in full bloom. It wiped out any furt…