 At the time, although he noted it, he thought little of it, but on hearing of the accident he felt compelled to bring this to the attention of the authorities.Following the accident, wagon LA201 was selected for rolling-road tests at Doncaster having been judged to be in an almost identical condition to LA223 - the first vehicle to derail in the crash.As speed increased, flange-to-flange hunting (moving from side to side) was noted to set in under both laden and unladen conditions.