Princess saw enemies at every turn

Few people would believe for a moment that Prince Charles would plot to kill the mother of his sons.

The letter in which Diana made the claim 10 months before her death, and the fact that she handed it to a servant, says more about her own state of mind than about Charles. At the time she was seeing enemies at every turn.

Most of the balancing influences of her life - her private secretary Patrick Jephson, driver Simon Solari, policeman Ken Wharfe - had left her side. Close friends such as Kate Menzies and Catherine Soames had departed too, mainly due to her erratic behaviour.

She was relying on staff like Burrell or alternative therapists and gurus to help ease the pain of divorcing a man whom those close to her say she always loved.

Those close to her say she was in fact close to a breakdown.

The idea that he was "planning an accident" in her car to clear the way for him to marry Camilla does not make sense. Charles and Diana had divorced, and he was free to remarry.