Ok, I've been up too long messing with this.
I've resorted to using dvd2Xbox to try and rip this. This managed to rip most of the disc, failing to complete 2 VOB files. I then ripped 1 of the 2 VOB files via my NEC3500, the other VOB file I ripped again in my Xbox (Samsung drive).
I placed the 2 re-ripped VOB's in with the rest from my first Xbox rip. I opened up PowerDVD and quickly clicked through each file. Up to chapter 19 (of 21) the film would jump successfully back and forth between each chapter. From chaper 19 to 20 it would play the sound but no picture, again from 20 to 21, sound but no picture.
Quick sum up:
Ripping with Toshiba SD-M1402 = Fails at the same point as my DVD D Log above.
Ripping with LiteOn 167T = Fails about half way through the VOB files.
Ripping with NEC 3500 = Fails at the point above in DVD D Log.
Ripping with Xbox Samsung (using dvd2Xbox 0.59/0.61) Ripped all but 2 VOB files (which were incomplete). Ripping 2 incompleted files didn't work as final VOB pack wouldn't play last 2 chapters properly.
The disc is clean/undamaged in comparison to several other discs I have ripped previously. Looks like it may be damaged but unseen to my eye.