Child settlement visa - who signs declaration?

[dazzle]

We are just submitting my step daughters visa application.

I am in the UK with the child's mother.
I have completed the form online, but now having to sign the declaration.

Do I write my name, as I have completed the form?
Or do I type my wife's name, as her parent?
Or her grandmother's name, who will accompany to the application centre?
Or the childs name?

Thanks in advance

[dazzle]

To answer my own question, just seen in the guidance notes that parent/legal guardian should sign for applicants under 18