Windsor Castle has been the victim of a cat burglar every day for the past four years.
A cat called Mime, which lives in a Chinese restaurant 50 yards opposite, has been strolling past armed police and royal guards in order to dine with royalty - the Queen's corgis.
Mime is now such a regular visitor she gets VIP treatment. On the Queen's birthday when Mime's normal route was blocked due to a locked gate, security staff opened it especially to let her through.
Owner Kevin Lam said: "When people come to my restaurant after visiting the castle they ask me why the Queen's cat is in the restaurant. I keep having to tell them that she is actually my cat!"
But he said the ten-year-old cat's daily lunchtime visits had not always been appreciated by the corgis.
He told The Sun: "A courtier told me the corgis used to fight with her at first, but after lots of barking and some hissing they came to a sort of truce."