Why do london overground trains not have anything to hold when standing?

The train is so packed in the mornings so I always have to stand, along with lots of other people but there is absolutely nothing to hold onto. If the train were suddenly to lurch forward we would all end up on the ground. Honestly its super unsafe and I don't understand why they can't put some handles... show more The train is so packed in the mornings so I always have to stand, along with lots of other people but there is absolutely nothing to hold onto. If the train were suddenly to lurch forward we would all end up on the ground. Honestly its super unsafe and I don't understand why they can't put some handles dangling down from the ceiling or bars around or on top of the chairs.
So I'm curious as to why they dont implement any?
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