original_query: What were the specific actions of Robert Wilsdon that caused the accident?
query: What were the specific actions of Robert Wilsdon that caused the Eltham Well Hall rail crash?
answer: Robert Wilsdon's actions that caused the accident were primarily his intoxication from alcohol consumption before and after starting his shift, leading to grossly impaired driving ability and excessive speed while approaching a sharp curve at Eltham Well Hall station, resulting in the derailment.