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andos
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Yes, in theory you can swap those relatively easily. Just don't get phased if you take the first one down and find a bunch of wires all connected together where some of the blue ones are actually live.
One of the usual problems changing fittings is the condition of the ceiling where you want to hang it.
Airhead
Where people get into trouble is copying over the existing wiring to the three plate design. You may just have power for the light there but if not you need to know which is the loop in, loop out and switch line, the colour of the wire will not make much sense and if they're not sheathed with the correct colours don't make any assumptions about blue being neutral.
Read up on wiring a three plate and label your existing wires once you've identified them.