Countersignatory question for child's passport application

[scher]

Hi All,
I am going to submit my son's British passport application. I have one doubt regarding Countersignatory section. Shall I use my friend who works as a doctor and holds british passport. My friend is going to mention that he knows me (child's father) as a good friend from last 3 years..
please clarify my doubt..
thanks and regards,
scher.

[obormot]

I just applied for child passport (and it was approved, though still did not arrived).
I asked family friend and colleague to countersign (she saw the child, but probably never talked to him).
When she went online to confirm identity, the questions were about how she knows me, not my child..

[scher]

Hi obormot,
thanking you for your reply, may i know your friends designation..
thanks and regards,
scher.

[obormot]

? I work at the university, so my cosigner was university prof (which is just glorified "lecturer" - and lecturer is on the approved list)