The King has been forced to cancel a number of engagements after being taken to hospital having suffered a reaction from his cancer treatment. He was due to undertake four engagements in Birmingham tomorrow.
The full statement from Buckingham Palace is as follows:
Following scheduled and ongoing medical treatment for cancer this morning, The King experienced temporary side effects that required a short period of observation in hospital. His Majesty’s afternoon engagements were therefore postponed.
His Majesty has now returned to Clarence House and as a precautionary measure, acting on medical advice, tomorrow’s diary programme will also be rescheduled.
His Majesty would like to send his apologies to all those who may be inconvenienced or disappointed as a result.
His Majesty was due to receive Credentials from the Ambassadors of three different nations this afternoon. Tomorrow, he was due to undertake four public engagements in Birmingham and is greatly disappointed to be missing them on this occasion. He very much hopes that they can rescheduled in due course and offers his deepest apologies to all those who had worked so hard to make the planned visit possible.

Image Licensed to i-Images Picture Agency. 12/05/2022. London, United Kingdom. Charles and Camilla during a visit to Canada House in London. Picture by i-Images / Pool
The news comes a day after The King, accompanied by The Queen and The Duke and Duchess of Gloucester, hosted a reception at Buckingham Palace for regional media.
The King has been carrying on with his public duties despite being diagnosed with cancer in 2024, which meant he had to scale back some of his duties whilst he initially underwent his treatment.