White Smoke Should i be worried

[Nick090884]

As above peeps first start of the day the last three or four day i start the car let the sai do its business and then drive the car nicely til its warmed then the first bit of stick i give it i get one big white puff of smoke , not major but a bit. Now ive scanned the car and have a boost leak in the pvc area i think but no other faults. the exhaust sounds like its blowing but neither me having a quick look and the mot bloke could find it. All i can think of is a little blow somewhere causing a little condensation. Would be great to have your input . For some of your that have spoke to me before its a Aum .

Cheers in Advance
Nick