http://www.theguardian.com/uk-news/...southeastern-trains-london?CMP=fb_gu#comments
I assume you are referring to this article?
We regularly have these issues on various GN stations with monitors this time of year and it does lead to some delays.
The sun either shines directly into cameras meaning all you see on the screen is the sun and absolutely nothing else or it shines directly onto the monitor bank with no shade-try looking at an iPad etc in direct sun. Considering closing the doors is one of the most dangerous things a driver does any issues with image quality including the sunlight must lead to degraded dispatch. Easier said than done in some locations. On a straight platform (on the left of the train) with a 4 car it involves opening window, sticking head out, closing doors, checking again then going. But with a 12 car at lewisham with its severely curved platforms even standing half way down the train at an intermediate cab won't help. The driver will need to walk past each of the 12 cars to locally close each door then walk all the way back to the cab. Realistically when walking at a normal pace that will take over 5mins.
At a location like lewisham you would need several platform staff for a 12 car as a single member of staff wouldn't be able to see the entire train either.
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And it was 100% accurate, and a very real and very dangerous problem. Had a driver been unable to see in the sunlight and just guessed it was clear without walking the entire length to check resulting in someone's death this forum would be crawling with people calling for the driver to be hung drawn and quartered for failing to do their job properly. As would the comments section in the news websites where the brain dead amongst society can comment on stories.
Sadly with things like this we are damned if we do and damned if we don't...