original: it is the central datum point for measuring distances from london .
simplifications: it is the central datum point for measring distances from london . it is the central datum -lrb- a fixed starting point of a scale or operation -rrb- point for measuring distances from london . 1 . it is the midway data point for measuring distances from london . it is the chief thing fact point for measuring distances from london . it is the central datum point for measuring distances from london . it is the central datum point for measuring distances from london . it is the central datum point for measuring distances from london . it is the central information point for measuring distances from london .