The Queen will not attend today's Commonwealth Day celebrations due to her recent illness but is still expected to attend functions this evening.
Buckingham Palace said: "The Queen will regrettably no longer attend the Commonwealth Observance at Westminster Abbey today as she continues to recover following her recent illness.
The Duke of Edinburgh will attend the Observance as planned.
"However, Her Majesty will still attend the Commonwealth Reception at Marlborough House this evening to sign a new Commonwealth Charter.
The Queen hopes to undertake some of her official engagements planned for the rest of this week."