Blue Smoke

On my way back from france 2 days ago I went to overtake and dropped from 6th at around 60-65mph and went into 3rd instead of 5th engine revs roared and loads of smoke (bluey/white) bellowed out the back my first thought was ive blown the turbo even on start up/idle smoke was coming out the back of the exhaust. Engine seemed to tick over sweet enough but didnt drive any further to see if there was any power loss also heard a slight burble at the back of the exhaust on idle. Car still stuck in france awaiting repatriation is it the turbo or could it be something else.

VW Touran 1.9 TDI SE 105PS 145k miles also just been serviced and oil changed