I experienced being separated from a much loved grandchild for long enough to remember those feelings of despair, helplessness and yearning that are described on this thread, celeb. Those feelings will stay with me for life, and my heart goes out to anyone put in the same position. I have started a couple of these threads myself, if you look back over time. I think the help from counselling, family solicitors, mediation, family contract centres, Cafcass and others can be invaluable in resolving many cases. My ex-DIL would not engage in mediation and remains embittered and willing to sabotage the regular contact we now have with my grandson. Parental alienation was the main issue in our family, and I researched the legalities and possibilities of overcoming it until I was falling asleep over my computer, such was the depth of my despair at the situation I felt I had no control over. I'm lucky because my grandson is now that bit older (nearly 14) and able to speak for himself. So, in answer to your question, I do think I have something to contribute here from personal experience. I wish I hadn't because I know my grandson suffered from being kept from seeing his dad and me, and it has taken effort and much reassurance to help him catch up with schoolwork and begin to accept that his mother's threats that he will be homeless, or his dad will forget him, had no foundation.
Let's not get into questioning whether posters on this thread can legitimately put their view. We all have something valuable to say.