Lighting circuit - is my understanding correct?

lewism said:
You wouldn't have the last switch linked back up to the light fitting. The 3 core between the switches is all that's required. You take the brown from the light, tie it up to the brown of the 3 core (usually in connector, i do it to L1 and saves on the connection, but thats another ball game) which then goes on to the common of the right hand side switch. The black and the grey go in to L1/L2 on both switches and the blue (Sheathed brown) goes back up to the light switch.

Generally take the brown as common/perm live and your blacks and greys are usually your pass wires. Just depends on who your working with.

What you've shown is the loop-in method at lights, it can also be done at switches(Which is better). There is also the junction box method, which is everything back to a central point.
Click to expand...

So what you're saying is basically this (?):

https://i.imgur.com/O0GKhC4.jpg

I don't need to worry about the connections (second fix) as I am just running the cables for the first fix.

How is loop-in at the switch better?
 
Does this work okay?

https://i.imgur.com/UnGGxK7.jpg

1. Consumer Unit to first light.
2. to second light (from first light). This light is controlled by a 2 gang, 1 way switch - 2 lights controlled by a gang each - 2 lights in a single switch in a single room.
3. to third light (from second light). This light is controlled by a 2 gang, 1 way switch - 2 lights controlled by a gang each - 2 lights in a single switch in a single room.
4. to the fourtth light (bathroom light) - (from the third light).
5. The bathroom light switch is connected to a fan isolator via 1.0mm 3 core and earth and the fan isolator is connected to the bathroom extractor fan via 1.0mm 3 core and earth.

https://i.imgur.com/UnGGxK7.jpg
 
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