The jailing of Mazher Mahmood has led to calls for the revival of an inquiry into the relationship between police and the press.

The 53-year-old “King of the Sting” was given a 15-month jail term for having tampered with evidence in the collapsed drugs trial of pop star Tulisa Contostavlos.

Campaign group Hacked Off, formed in the wake of the phone-hacking scandal, said the need for the second part of the Leveson Inquiry was “overwhelmingly clear”.