Meghan sues Mail on Sunday as Prince Harry launches attack on tabloid press

Prince compares wife's treatment to Diana's as proceedings over private letter are announced

Meghan, Duchess of Sussex has taken the unusual decision to sue the publisher of the Mail on Sunday after the newspaper published a handwritten letter she had sent to her estranged father.

The decision came as Prince Harry launched an extraordinary and highly personal attack on the British tabloid press and its treatment of his wife, saying he could no longer be a "silent witness to her private suffering".