Value contribution is the core factor to decide enterprise whether to operate reverse logistics or not. The law just plays a role in lever.

逆向物流活动的价值贡献是决定企业是否开展该项活动的核心因素，法律法规在其中只起杠杆调节作用。

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Chris Hall, of the Rail Accident Investigation Board, said that Mr Lund would have had "no reason to believe" the train would change direction, which was most likely caused by the driver forgetting to lock the reverse lever.

BBC: North Yorkshire Moors Railway death: Family to sue

Mr Ash said it was possible he did not lock a reversing lever into place, which could have prevented the locomotive from slipping between forward and reverse.

BBC: North Yorkshire Moors Railway guard crushed by train

Mr Ash, a retired professional train driver with more than 50 years' experience, said it was possible he did not lock a reversing lever into place, which could have allowed the locomotive to slip between forward and reverse.

BBC: North Yorkshire Moors Railway death: Family to sue