Design a lighting circuit for two lamps (Y and X) controlled by two 1-gang two-way switches, and specify cable sizes.

Here is the breakdown of the tasks:

Task 1: Lamps Y and X are to be controlled by two 1-gang two-way switches.

This means that both lamps (Y and X) will turn ON or OFF together, and this action can be initiated from either of the two switches. This is a standard two-way switching circuit.

Task 2: Reproduce the layout diagram, indicating the number and size of cable in each section.

We will assume a standard cable size of 1.5 mm$^2$ PVC insulated copper conductor for lighting circuits. The number of cores will vary based on the wiring requirements for a two-way switch circuit.

Let's label the points in the diagram