Britain's Queen Elizabeth II, right, Camilla, Duchess of Cornwall, centre, and Kate, Duchess of Cambridge stand outside the Fortnum and Mason department store for a ceremony to unveil a plaque to commemorate the regeneration of Piccadilly in central London, Thursday, March, 1, 2012. (AP Photo/Alastair Grant)
March 1, 2012 7:26:09 AM PST
LONDON (AP) -March 1, 2012 --
Queen Elizabeth II will be joined by the Duchess of Cambridge and the Duchess of Cornwall for a tour of the posh Fortnum & Mason store.