Stopping point at Gunnersbury eastbound

It's worth adding that at Honor Oak Park, Class 378 trains stop further back on Platform 2 while Southern services stop at the top of the platform.

With CCTV cameras carried on the train and/or a guard it should (in theory) be possible for a train to stop anywhere on a platform where the whole train is on the platform, the driver can see all the signals/repeaters they need to see and the train is correctly aligned with CDSE loops or equivalent. Other things being equal, they should stop at the point most convenient for passengers.

OPO/DOO trains using external equipment are tied to the position of that equipment.

Probably the same reason at Gunnersbury, where the District Line stop is right by the signal. It seems a bit daft for two parts of TfL to have different rules on this, but maybe it's because the District has tripcocks and LO doesn't.

Edit: Hang on, isn't an LO train protected by TPWS anyway?

That is an awful reason, and I hope it's not true. Why inconvenience passengers just because drivers are so inattentive that they can't see which side the platform is? Anyway, don't the guards open the doors on LO?

Why is that such an awful reason? TOC's have a responsibility to minimise risk - better passengers have to walk a bit further than experience increased risk of wrong side door release. You make it sound as though wrong side door releases are down to drivers being too casual. In fact it is very often down to a procedure becoming automated in the sense that repetitive behaviour coupled with additional factors (such as momentary distraction) cause an action to occur. I don't work this station, but stations with right hand side platforms are notorious for increasing risk. Drivers need to be in the mindset to focus all their attention on the right hand side at such platforms - if the car park (or anything else) is drawing their attention away from where they need to be looking then that increases the risk massively.

Ultimately any wrong side release is a driver error, but you can guarantee that drivers will have various protection strategies in place to minimise risks and what the TOC's implement in terms of stop marks, reminders, etc goes some way to minimise that risk further.

Risk minimisation is also behind any moves to bring stop markers further back behind signals regardless as to whether TPWS is fitted or not. It not only mitigates against TPWS activation and or potential overrun SPAD's but it also mitigates against SAS (starting against signal) SPAD's too. You could suggest that those scenarios would involve driver 'inattention' too, but if you take that line too strongly why introduce technology at all? Human factors is and always will be a part of the railway. No driver sets of to work to have an incident.

As mentioned already the stopping point has been moved to prevent wrong side door opening where there have been 16 incidents of this taking place at this station alone since the introduction of class 378s on the North London Line. What was the figure when class 313s stopped there?

The Guards do not open the doors on these trains, the driver does. The Guards close them, and anyway in December it wont be a argument as the guards will be removed from the trains. People like me will probably be left to clean the drivers toilets.