Watch: King Charles smiles on arrival at cancer centre as he returns to public duties

The King smiled and waved at onlookers as he arrived at a cancer centre in central London, to mark the monarch's return to public duties.

Inside University College Hospital, King Charles talked to staff and patients.

It is his first public engagement since February, when he announced that he had been diagnosed with cancer.

Read more: Returning King tells cancer patients 'I'm well'