The coolant level doesn't look like it's dropped and the oil and water do not look like they are mixing, it is very definitely a heavy white smoke (not blue or black) I don't think it is just a case of steam, there is enough white smoke under heavy acceleration when the engine is cold to smoke out an intersection. Yet once the engine has warmed up the problem totally goes away.
So what does it sound like guys? Weak spark? Over fueling? Dodgy PCV valve? Any help would be great

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