Hi. I’ve currently got an outside light (pictures attached). It’s a 3 twin and Earth whereby the cable runs from a switch and the cable is in the wall and comes outside the brickwork into the junction box where the outside light is connected to it. The cables are all in the little white/clear connection blocks. There are 2 neutrals which are in the same slot in a clear connection block however 1 of the neutrals is the grey cable from the house with a blue sleeve over. The earths are all in the same slot on another block. The permanent live is in another block on its own. Then the live from the outside light is connected to a block with the black cable from the house with a brown sleeve on so I’m guessing that’s only a switch live when the switch is in the ON position. My question is can I wire up another light for the side of the house to this point and would it be to the single live or the switch live depending on if I want it to be switched on or off like the other existing light. I have a bigger junction box and wago connectors, 20mm conduit piping for the T and E cable and the outside light. Would 1.5mm T and E cable be fine?