shifting some soot from the turbo and out of the soot trap in the exhaust when it's on full boost,
and maybe a bit of unburnt fuel thrown in aswell,
nothing to worry about
 
that aint nothin mate...i've seen TDi's puttin out worse. don't forget it's a diesel so now and again you will get the odd blacker smoke where the soot is being pushed out as well as any unburnt fuel
 
A remapped car with no cat and a straight through pipe I imagine.
Your probably looking at 200bhp + from that Derv to justify that level of smoke.
I had a PD100 remapped to 150bhp and I barely had any smoke ever!
 
Plus the car isn't moving, if it was that smoke would have spread out down the road and not looked half as bad