Then paragraph 5.4 on the same page, the concept of proportionality is dealt with and the procedure says:
"Any action that amounts to a breach of privacy must always be proportionate to the subject matter under investigation. For example, to justify secret filming in a private place, the actual subject matter and/or wrongdoing being investigated must be serious. Not every investigation will warrant employing such methods."
That follows a section on the public interest. Am I understanding correctly that at ITN, before you will invade privacy, you expect there to be a public interest and a test of prohibitionality, both of which must be passed before you proceed?