Update: I drove the car to work today and dropped down a gear or 2 on the freeway for ~20km to force a DPF regen.
After a few minutes I noticed the regen start on forscan. EGT went up to ~630degC and I watched the DPF soot load steadily decrease from 75% to 25%. It seemed to bottom out at 25% and EGT returned to ~200degC.
Since the regen worked OK today I guess there's the issue with vaporiser/glow plug was a once off. Or at least not something I'll stress about until P269F happens again.
On a side note, the DPF regen process seems a bit flawed. Mid way though the regen I slowed a little and almost as soon as the RPM dropped the regen stopped. I dropped down another gear and it started again. My point is that the regen seems to only work at much higher RPM than the car is likely to be in if driving in Auto. So the process requires driver intervention but the driver has no idea if regen is needed or if it happening (unless monitoring through OBD). That's my simple take on it anyway, but surely there's more going on.
cheers. that's the same
TSB as the link in my
OP, but with the full repair instruction.