A question raised in the latest comment.
The point on the left is non isolating and the one on the right is isolating.
When the point is switched to the main line the turning to the right in this case is isolated and an engine can be on this line but is dead.
Both the main line and the turning are both live regardless which way the point is switched. Trucks can be left on this line but not an engine as it would be live to the controller.