Frogmore Cottage is Prince Harry, 36, and Meghan Markle’s UK home but it is reported to be on loan to Eugenie and Jack as the Sussexes are now based in the USA full time.
Prince Andrew withdrew from public life last November following backlash over a TV interview about his links to dead paedophile Jeffrey Epstein.
While big Royal Family birthdays are usually marked by Union Flags being hung from Government buildings, last year the Duke of York’s 60th birthday went by quietly without any pomp and ceremony.
This year, however, Andrew could celebrate a very special birthday as it may immediately follow the birth of his first grandchild.