I wouldn`t be to paranoid about it
My wife put petrol in her Skoda Fabia TDi.
Ran it for 20 miles or so.
Kept saying the car was down on performance until it finally cut out on her on the way home.I towed it home with my trusty Freelander.
Jumped in the Fabia and it immediately started and ran fine,for about 7 mile.
It cut out again
.I removed the fuel filter and smelled petrol.
I removed the fuel from the tank and put in a gallon of diesel.Then kept on turning the ignition on and off until I got diesel into the filter chamber.Banged in a new filter and started up.I then as Singvogel stated in his post,filled up with V power and a good dash of 2 stroke oil.
The fuel I drained off was nearly pure petrol,although not pure enough to run my mower.
The car had ran on the petrol I believe,until the fuel vaporized in the pipes.
Oh and yes its gone like stink ever since.
Probably cleaned out all the crap.
Of course its not a common rail system but high pressure Pump Deuse, a better more robust system I think.