Kate sends emotional apology letter as she misses out on key rehearsal for

The letter is viewed as confirmation she will not join the Royal Family for the King's official birthday celebrations on Saturday June 15, including their traditional Buckingham Palace ­balcony appearance. Insiders have long emphasised that every cancer 'journey' is individual and believe speculation over whether Kate will attend key events such a trooping create unnecessary pressure at a time when she has asked for space and privacy. It means the Princess of Wales will miss what would have been her first Colonel's Review, which had been due to take place at the end of next week.