Extension Sockets and Lighting

[jbladder]

Currently building a single floor extension to my house. I have located an upstairs socket to tap into the mains ring.
Can I also run a fused spur from this \\\'tap\\\'to supply the lighting in the extension?

[securespark]

You only have one ring main in the building? That is BAD!

If you have more than one ring, and are tapping into the first floor ring to feed a ground floor room, that is also < ideal.

__________________
As George Michael once said, "..if you're gonna do it, do it right, right?"

[JohnD]

you want to supply lighting to the extension. You doubtless already have a ground-floor lighting circuit in your house. Is there a good reason why you don't want to supply the lights in your ground-floor extension from the same circuit as the other ground floor lights?