After Charles's brief medical visit, he returned to Clarence House, which serves as his London residence and was said to be on good form as he worked on state papers and made calls from his study.

Charles was pictured smiling and waving as he left his Clarence House home in central London where he spent the night with the Queen following the “minor bump” in his cancer journey.

His engagements for Thursday afternoon and Friday were canceled. “His majesty has now returned to Clarence House and as a precautionary measure, acting on medical advice, tomorrow’s diary ...