Another ceiling light question.

[Unclebill]

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We are refurbishing a room and on trying to replace old ceiling light I found that there are only two wires sticking out of a metal tube conduit both of which are red. The new fitting has a transformer so I'm assuming that it should be wired as the instructions suggest, live to live, neutral to neutral and earth to earth.
Only problem is there is no earth and, as stated before, both cables are red.
How do I find out which of the two wires go where and how do I fit an earth?
All suggestions gratefully received!!!

 

[LukeScotty]

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[Unclebill]

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[TonyM58]

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[Unclebill]

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[TonyM58]

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[Unclebill]

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[Unclebill]

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[ian.settle1]

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