Smoke pouring from tube under N/S of car??

Hi all, New here, first time owner of an 06 freelander 2.0 TD4 sport.
Loving it, loving it, but pulled up at home the other night after coming home from work (over 20 min journey). When i switched the engine off I could hear a wurring pump sound coming from the front bit like a fuel pump whizzing away. I then noticed bluey smoke billowing out from some kind of outlet tube under N/S front by wheel. Cant seem to find anything out about it and its been driving sweet since...Any ideas before I take it back to the garage I bought it from???

Thanks in advance

Mark.

It's the FBH (Fuel Burning Heater) which come sup when outside temperature goes below 5°C, when engine is switched off the fbh takes a little while to run out, that's the noise and the smoke is of the burned diesel. Perfectly normal.

ah nice one...and me being mechanically minded..i was stumped by that one!! Cheers