Tom Mockridge, who succeeded Rebekah Brooks as News International chief executive has told staff in an email it was "important that proper due process takes its course and we must not prejudge the outcome" of the cases against Hanna and Edwards.
Following the announcement of the charges, he wrote:
I appreciate this is tough news, particularly if you worked closely with those charged today.
This is a difficult period for all of us at News International.
I am deeply grateful for your continued professionalism and commitment as we deal with these issues."
Rebekah Brooks angrily attacked police and prosecutors tonight as she said she was "baffled" to face charges.
Former News International chief executive Rebekah Brooks has been charged with perverting the course of justice.
Former News of the World editor Rebekah Brooks has been charged with perverting the course of justice during the phone-hacking scandal.