Investitures are honours that HM The Queen, or a member of the Royal Family bestow upon a chosen member of the public.
Prince Charles has many different relationships within his own family.
Her Majesty, Queen Elizabeth, and HRH Prince Philip have 8 Grandchildren.
These men are the children of HRH Prince Charles and the late Diana, Princess of Wales.
To be able to operate well, the Queen needs the ability to think clearly.