Her Majesty was due to attend a military celebration in Wales during the country's St David's Day celebrations, but was forced to cancel her planned engagements.
Buckingham Palace declined to comment on her condition, but a spokeswoman earlier confirmed the Queen would spend the weekend at Windsor.
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Sir Bruce entertained audiences for more than seven decades.
Aisling Creevey has the weekend forecast for the east of the ITV Meridian region.
Aisling Creevey has the weekend forecast for the west of the ITV Meridian region.