Slight starting issue, lumpy idle, etc

[Dazecoop]

Hey guys,

Just done basically a full service on my car in the past week (gearbox oil, engine oil, oil filter, air filter, fuel filter). All is well, did about 150 miles yesterday & it was perfect. Turned on & off quite a few times, perfect.

Now suddenly, just a minute ago, started on 1st crank instantly as it always does, but then lumpy idle & blue smoke out the back. Ran like it for about 10 seconds, turned the car off, turned it on again, same thing, revved a bit, then it cleared & was fine.

Drove it 10 minutes, totally fine. Turned off & left it for an hour, turned back on, same thing but for maybe 5 seconds then cleared.

Not bothering me too much, as it cleared quite quickly, but its just strange this is the first thing like this I've had, and I've just serviced it! Wondering if I'm catching the start of something failing perhaps? If so need to catch it soon as I'm doing a lot of miles in it this month! 

Car is XUD D turbo ph2, bone stock, Lucas pump untouched, running normal diesel from pump, never run on veg, never run out of diesel, tank is 3/4 full

Thanks!