Oh, good grief, you surely don't think that I need to be directed to that?!!. So, when you said 'the central loop', you meant to 'loop terminals (which are usually the 'central' ones) of the rose'?//www.diynot.com/wiki/_detail/electrics:lighting:lrblbn1w.gif?id=electrics%3Alighting%3Asingle_way_lightingIs it a secret, or are you going to help me to understand? You could perhaps start by explaining what you mean by 'the central loop'
See the bit in the centre marked 'loop' .... This is very basic stuff here!
But this has got absolutely nothing to do what I was saying. Of course the permanent live feed for any extension would have to come from the 'loop' terminal block of a rose which has permanent live - but, as I said, with what has been proposed, a permanent live would only be present at that terminal block in the first of the three roses - which would mean that would end up with 5 cables (plus pendant flex), each with two conductors plus CPC, going to that first rose, if one extended the circuit from it.
Kind Regards, John