Thanks for your help and the diagram. :D
So would I be right in saying that the neutral to the lamp is effectively taken from the feed in/feed out T+E's via the rose. The switched live comes from the T+E from the switch (of which only one core is used)?
Can any one help, I have a mysterious wire in my ceiling!
The wife wasn't happy with the standard light fitting in the lounge so went out and bought a new one. After some extensive nagging I finally attempted the swap over today.
Disconnected old light fitting and ceiling rose (as new one...