The problem is I don't know which sockets connect to which. They must be daisychained since there are only 2 sets of cables on the master, 2 sets on each bedroom, 2 sets on one of the living room sockets and one set on the other living room socket. So I guess it seems to go anti clockwise around the flat, ending at that living room socket that only has 1 set of wires.
So I think I physically can't set the living room socket as the data one on it's own without it going through both bedrooms first. Unless I disconnect that final living room socket, which would make the other living room socket the final one, and thats the one I want to use! I have a plan!

The only thing I would have to figure out is which wires I disconnect from that living room socket that current has 2 pairs, I guess it is not obvious which is the incoming pair and which is the outgoing extension pair that I will want to disconnect (other than trial and error).
Although I don't know how much performance will be degraded by it running in a big circle around the flat? I gues could be none, or could be shitloads.
Edited by Ewok (Thu 12-Apr-18 19:17:39)