The spatial development strategy shall contain a diagram, called the key diagram, illustrating the Mayor’s strategy for spatial development in Greater London.

The spatial development strategy may also contain a diagram, called an inset diagram, drawn to a larger scale than the key diagram, and illustrating the application of the Mayor’s general policies to part of the area covered by the spatial development strategy.

Where an inset diagram is included in the spatial development strategy, the area covered by the inset diagram shall be identified on the key diagram and the application of the general policies to that area shall be illustrated on that inset diagram only.

No key diagram or inset diagram contained in the spatial development strategy shall be on a map base.

The title of the spatial development strategy shall be set out on the key diagram and on any inset diagram contained in the spatial development strategy and the key diagram and any inset diagram shall include an explanation of any symbol or notation used in the diagram.