Personally, I am glad to hear that schools are trying to peruade modern parents to stop molly-coddling their children.
Unless you live in a very rough area, any nine year old should be able to walk alone to and from school. If they are not, then it is time they began to learn to go out and about during daylight hours alone, either walking or by public transport.
Likewise, it is far better that a nine year old learns that homework that either was not done or scamped gets her into trouble at school, than that she leaves school at sixteen still not knowing that actions have consequences.
Old fashioned views? You are at liberty to think so, but forty years of teaching children has led me to believe that it is harmful not to teach them levels of independence suitable to their age group.
As to a nine year old going on a school trip abroad. What are you afraid of? No teacher is going to allow any nine year old, whether young or old for her age to wander round a foreign city without adult supervision!
You can safely assume that the children will go everywhere together as a class, with the two members of staff who are with them at all times.
The girl wants to go, her parents are content to allow her to, and her teachers believe that the children they are taking abroad are obedient enough to do as they are told, otherwise they would not be taking them.
So please, worried gran, button your lip and stop worrying if you possibly can.