Was talking to a friend who drives trains for a living, he mentioned he sometimes sees a blue light on the side of Royal Mail trains and often wondered what it is.
Do any of you guys know ?
Thanks
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Blue light on side of Royal Mail trains
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NWpostie
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Blue light on side of Royal Mail trains
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Dindin
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Re: Blue light on side of Royal Mail trains
Could it mean there's a copper on board ?
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clashcityrocker
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Re: Blue light on side of Royal Mail trains
Trimble?
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General Mannerheim
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Re: Blue light on side of Royal Mail trains
It means that the postie working inside is charging his phone. 
Take your pick from some sort of motion detector or that the shutters have been engaged properly.
Take your pick from some sort of motion detector or that the shutters have been engaged properly.
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SpacePhoenix
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Re: Blue light on side of Royal Mail trains
It's a warning that the load has shifted and whoever is opening the door should be prepared for stuff falling out
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NWpostie
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Re: Blue light on side of Royal Mail trains
Some funny answers 
Found out elsewhere what it was, apparently it tells you that the shutters are unlocked.
Found out elsewhere what it was, apparently it tells you that the shutters are unlocked.
Six of Nine loves Seven of Nine, together in Electric Dreams.
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ConeHater
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Re: Blue light on side of Royal Mail trains
Aye, I asked those in the know earlier, if the blue light is on, the door/shutter ain’t properly secured. Hopefully your train driver mate hasn’t noticed them illuminated whilst it’s on the move !