In a statement on Monday Buckingham Palace said: “In line with current government guidelines, and as a sensible precaution in the current circumstances, there will be no large scale events held at Buckingham Palace or Windsor Castle for the rest of the year.
“A variety of possibilities were examined to see if it was possible for Investitures to safely take place in line with the guidelines.
“Sadly, due to the large numbers of guests and recipients attending, it was not possible to find a way of safely delivering these events in the current circumstances. Recipients will be contacted directly.
“The Queen’s intention remains to return to Windsor Castle in October and to resume the use of Buckingham Palace during an Autumn programme of Audiences and engagements, in line with all relevant guidance and advice.”
The monarch and Prince Phillip are currently staying at Sandringham after cutting short their holiday at Balmoral Castle.
They are expected to move to Windsor Castle later this month.