2003 K12 1.2 won't start in fog/damp with new battery, plug change needed?

[suavegarve]

Very foggy this morning and car won't start. I believe these cars don't have the old distributor cap and leads, so would it be worth changing the plugs, could that even be the issue?

Battery is new and working, sensors all good, belt also good. Runs perfectly fine at any other time.

Any ideas always appreciated, thanks.

 

[Mika The Finn]

Sounds like corrosion...
Have you cleaned battery terminals & cables and greased them with dielectric grease?

 

[WightK12]

A new set of plugs would not do any harm, buy them from a reputable dealer, not eBay there are a lot of fakes out there.
do them one at a time remove `cap` spry it with WD40 and then remove the plug replace with new plug and wipe all the WD40 off, refit cap and then next plug ,finally spray all with WD and it should be good /