I am not quite sure what you mean Edam. People are not prevented from seeking redress. that is why we have the ECHR. the UK has been subject (sadly) to loads of adverse judgments about how they've cocked up in family cases. Which they do. We are all human and we make terrible mistakes, hullo Professor Sir Roy.
But secret is the pejorative word for private. And I do think it is a good idea that distressing, scurrilous facts about a child's circumstances are kept OUT of the public domain.
Seeking redress when you have been the victim of a legal injustice is entirely another matter. I am not aware of anything preventing people from seeking justice if they have an arguable case that their article 8 rights have been breached without justification.
I think you do have to be careful about getting only one side of the story when people tell you about their sufferings in the family court. remember that father quoted in the Evening Standard some years ago. Sent for jail for sending one text!! read the headline.
Yeh... one text AND several phone calls threatening to kill the mother of this child.