Under Australian family law, children have the right to spend time with and communicate with their parents and other people who are important to them. This includes grandparents and other extended family members.
Grandparents can apply to a family law court for a parenting order. This means that a family law court can make an order for a child to live, spend time, and communicate with a grandparent
In Canada Grandparents have the right to apply for visiting rights and decision-making responsibility, as long as it is in the child’s best interests.
In dire situations, the grandparents can even seek the Court’s approval for sole decision-making responsibility and even custody. Usually the Courts will grant this if the grandparents can prove that the child’s parents are unfit to exercise decision-making responsibility or to have custody/parenting time over the child. The simplest example to this is when both parents are abusive or are drug addicts.
USA In many states, grandparents have the legal right to request visitation with their grandchildren. If the parents object, the court will consider this. The court will also consider several other factors that focus on the well-being of the minor child.
France The child has the right to have personal relationships with his grandparents. This right can be suppressed only for very serious reasons. The provision concerns all ascendants (ancestors) of the child, so great grandparents also have a contact right with the child.
It does seem as if the UK needs to take another look at this situation.