Royal correspondent Rebecca English accompanied Prince William this week on a visit to a center for homeless people. The journalist then notices the emaciated silhouette and hollow features, which she puts down to fatigue.

We now know the nature of the burden weighing on the heir to the throne. And it is twofold. His father first. King Charles III, aged 75, is treated with chemotherapy once a week. Doctors have recommended that he cancel his public engagements until further notice, although the sovereign continues to fulfill his constitutional duties at his home in Sandringham.