Why is my Vauxhall Corsa not starting properly?

My 2004 diesel Vauxhall Corsa doesn't start on the first key turn and barely on the second is there something wrong with the car or is it the cold?
Possibly a low battery and the glowplugs not heating up sufficiently. Or a fuel filter blockge due to emulsified ('waxed') fuel.
Answered by Honest John on

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