The stationmaster was supervising Scrutiny shunting operations Control , during which a high-sided wagon was fly-shunted ( i.e .

As another six wagons were being run Motion onto an adjoining road , the stationmaster saw the high-sided wagon being blown out Damaging of its siding by the wind to meet Come_together them .

The stationmaster ran Motion towards them waving Motion a red lamp but the drivers thought he was signalling Warning to the shunters and did not slacken Cause_change_of_position_on_a_scale speed .

It also emerged Coming_to_be that the stationmaster at Vitry-le-François had earlier received Receiving a threatening letter from the OAS .