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Old March 26th 08, 12:15 PM posted to uk.transport.london
[email protected] crispin.proctor@gmail.com is offline
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First recorded activity at LondonBanter: Jul 2007
Posts: 5
Default LEDs on the front of Picc trains.

Finally a friend of mine found out the answer: It's the hazard light.
He's pretty adamant. I'l go with that then