Well now, #Mandelson has just issued a "not for publication" Editor's Code notice that he does not wish journalists to contact him including the statement :
"journalists must not persist in questioning, telephoning, pursuing or photographing individuals once asked to desist, unless justified in the public interest."
Yes, I think the public interest test is well satisfied.
https://www.thenational.scot/news/25834517.full-secret-notice-peter-mandelson-just-sent-uk-media/