networkn:Dumb question but do the LED lights have an earth connector? I presume if it does, it matters greatly which port you plug into, however the other two as I am led to believe, it doesn't matter, phase or neural as they auto switch?
First. Phase and neutral do physically matter a lot of the time, and legally matter all of the time.
As for an earth, it depends on the fitting. But if it has the terminal it probably has to be connected. I've never seen a fitting with an earth that doesn't need one, but they might exist.
If there is an earth wire, and the existing fitting has more than one cable to it, you need to connect the earth's together even if they aren't being used. This is so that a fitting downstream that needs an earth, has one.
I'd definitely recommend some of the newer fittings that have a standard three pin plug on them. Get the wiring changed once and never worry again.