checked out the Scottish govt site and other consultations.
from the current whistleblower one -
"Handling your response
If you respond using Citizen Space, you will be automatically directed to the Respondent Information Form at the start of the questionnaire. This will let us know how you wish your response to be handled and, in particular, whether you are happy for your response to be made public.
If you are unable to respond via Citizen Space, please complete and return the Respondent Information Form attached at the end of this document as this will ensure that we treat your response appropriately. If you ask for your response not to be published, we will regard it as confidential, and we will treat it accordingly.
All respondents should be aware that the Scottish Government is subject to the provisions of the Freedom of Information (Scotland) Act 2002 and would therefore have to consider any request made to it under the Act for information relating to responses made to this consultation exercise."
but from Rhoda Grant's 2012 consultation document on legislative change
"113. Therefore, if you wish your response, or any part of it, to be treated as anonymous, please state this clearly along with the reasons for this. If I accept the reasons, I will publish it as “anonymous response”. If I do not accept the reasons, I will let you know and give you the option of withdrawing it or submitting it on the normal attributable basis. If your response is accepted as anonymous, it is your responsibility to ensure that the content of does not allow you to be identified."
I think it may be standard text in consultation documents and not something jean or her civil servants have come up by themselves.