Former SNP depute leader Jim Sillars is to speak out against the Scottish Government's plans to introduce a "named person" for every child.
Mr Sillars, a former SNP MP, has been announced as one of the key speakers at a special conference organised by the No To Named Persons (NO2NP) campaign group.
Aidan O'Neill QC, a lawyer involved in the successful Supreme Court challenge to the policy, will also speak out at the event, which is taking place in Edinburgh on March 20.
READ MORE: Calls to come clean over Scots job losses in Standard Life-Aberdeen merger
It comes after Education Secretary John Swinney announced an ''intense'' three-month consultation on how to make the scheme comply with European human-rights law in September last year.
The consultation was announced six weeks after the UK Supreme Court ruled elements of the policy to be ''incompatible'' with the right to privacy and family life, as set out in the European Convention on Human Rights (ECHR).
NO2NP spokesman Simon Calvert said the group was renewing its opposition because the "Scottish Government wants to press on and provide a replacement scheme".
He said: "They recently held a consultation or engagement process primarily with those groups which back the scheme.
"We were not invited to attend because we oppose the scheme, even though we represent the views of more than 35,000 supporters and, indeed, majority opinion in Scotland.
"In 2016 ComRes found that only 24% of Scots thought every child should have a state-appointed named person. Almost two-thirds believed it was 'an unacceptable intrusion into family life'.
"We have now decided to give our supporters a platform to receive important information, to debate and to engage on the key issues which are at stake."
The named person policy, introduced as part of the Children and Young People Scotland Act of 2014, set out to appoint a single point of contact, such as a teacher or health visitor, to look out for the welfare of all children up to the age of 18.
After the legal challenge, Mr Swinney was forced to act to halt the roll-out of the scheme, which has already been trialled in some parts of Scotland.
It had been due to be introduced across the country on August 31 2016 but Mr Swinney later said he hoped a revised scheme could come into force a year on from that.
Mr Swinney said: "I made clear in my statement to Parliament in September that the Scottish Government remains absolutely committed to the Named Person service as a way to support children and their families.
"It ensures early support is available for all families because it's simply impossible to predict if or when they might need extra help.
"Last year the Supreme Court ruled definitively that the intention of providing a Named Person for every child to promote and safeguard their wellbeing was 'unquestionably legitimate and benign'.
"Their judgement did, however require us to change the provisions relating to information sharing.
READ MORE: Calls to come clean over Scots job losses in Standard Life-Aberdeen merger
"Since the judgement, we have undertaken an intensive period of engagement with children, young people, parents, carers, practitioners and professionals.
"I will now update Parliament on the next steps in this vital means of supporting, safeguarding and promoting the wellbeing of our children and young people."
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules here