The thing is in situations like oldlady describes then we already have procedures to deal with that through childrens social services. These laws as far as I can see are only to provide access to grandparents not to take the child away.
If a child's parents are seperated then there are procedures in place for the absent parent to fight for access - if they need amending then that is a seperate issue.
AFAIK this idea was put forward to allow gps, when their child hasn't got access to the grandhildren to then fight for access/visitation rights themselves.
But surely this is a family problem not a legal one? If the absent parent has access then they can allow their parents to see the child if they choose, if they haven't got access then there is legal recourse to fight for it, and if they are not interested then, it should be a family matter for the grandparents to either contact the parent who has the children to see if they can arrange something or if not put pressure on their child and support them to gain access.
Where a child has been removed from the parents then maybe it is in the child's best interest not to see the grandparents - or again there are procedures to ask for this type of thing.
The people I can see losing out here are the ones who refuse their own parents access to the children for whatever reason and now feel threatened (like me and others on this thread).
Maybe the procedures in the other instances don't go far enough but that should be then campaigning for a change in those, not these new laws.
The only people who have a right to see a child are the parents - unless they have done something bad enough to lose those rights. I'm sorry that it is hard on grandparents to lose contact with a child, but tough.