I have just purchased braided flex and a 5 point ceiling rose to take 5 E27 pendants. Also I have 4x5 point wago and 2x3 wago connectors to join all the earth, live and neutral wires. I plan on putting all this into a junction box with glands to fit the braided flex and flat 1/1.5 twin and Earth. My question is, can I run the braided flex through the attic space for about 50cm before the junction box, so as to get the junction box in a larger part of the roof space, to make connections easier for the sparky? OR do all wires in the roof space have to be the standard grey flat stuff?!