Hey guys, I used to take electrics at college but I dropped out and it’s been so long since then that some stuff has been forgotten. I’m replacing the light fixture in my bedroom. I’ve had a look in the ceiling rose and it’s old wiring, done 50 years ago and never been changed (I’m talking black and red wiring). There are 3 red wires grouped together, 1 red separate going into the block with the live brown for the pendant, (I think this is a switch live). 3 greens going into the earth port and 2 blacks over in the neutral zone. None of them have additional sleeving on them to determine what is a switch live or anything so that’s super helpful. Also to make things easier my next light I want to put up has only 3 ports. One for N one for L and one for E. I’m assuming I need to put a couple of cables in a connector block and put the 2nd dilemma I have is that I want to replace the 1 way switch and make it a dimmer switch, both wires are red wires so I know 1 has to be a neutral. There is also no sleeping here to determine which is actually which. Also the switch doesn’t have L1/L2 or Com on it. It’s so old it just has Top. All I can think of is to put the Top wire in L1 and the other in L2.