Wiring light on old ceiling rose and which wire is live and neutral Ask questions and find answers to many subjects relating to electrics and electrical work

[Stayathome]

Which connector is live which is neutral. All black wires with two going into one side and one into the other. I cannot find any marks on rose. I don’t want to replace if possible only Connect light back after taking down to decorate. I can’t find any markings at all?
Wall has a dimmer switch

[Mr White]

The red wires are live.
The single black wire is switched live.