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They have similar ones on the M1 and they were flashing like mad last week when the red circle speed limit was on (i was on opposite carriageway.)
I'm assuming they are only active when showing a speed limit inside a red circle, and not when its a number with the 4 flashing yellow lights?
They have similar ones on the M1 and they were flashing like mad last week when the red circle speed limit was on (i was on opposite carriageway.)
Were you going north from the M25? I think there was a faulty flash, it seemed to be going off constantly and I spoke to a few people who saw it so it was doing it for a while.