Charles has 'a right to privacy' over his letters to ministers: Government lawyers argue Prince's notes must not be published because they are part of training to be King
Attorney General making final attempt to block release of Charles' letters
The letters to Government ministers subject of 10-year legal battle
High Court wanted release but Government appealed to Supreme Court
Known as 'black spider' memos because of royal's scrawled handwriting
Prince wrote to at least seven departments about variety of subjects
Attorney General believes they must stay secret because they would 'seriously damage' his political neutrality when he becomes king
By MARTIN ROBINSON FOR MAILONLINE and SAM MARSDEN FOR THE DAILY MAIL
Mail