Relationship of applicant to intended passport holder – what if it’s me?

The new online service for renewing a UK passport is pretty simple – until you get to the form above. If you’re filling in the form for yourself, there’s no guidance on what to do with the “Relationship of applicant to intended passport holder” section – should you leave it blank, or write in “self”, or something else?

Apparently, the answer is that either works:

.. and I can confirm, as I did it myself: leaving this box blank works just fine.