Prince William pulled out of an important memorial at the last minute. Kensington Palace did not specify the reason for the heir to the throne's absence.
Kate Middleton underwent abdominal surgery in the middle of January, following which she was hospitalized in a London hospital and released to rest at home on January 29. The prince was expected to give a speech at the same event as a tribute to the Greek royal family at the event, but it seems that the situation of his family members at the moment does not concern the decision not to attend.