The prosecution told Birmingham Crown Court Network Rail would not spend money on an automatic locking device.

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Ted Scott, the American Trucking Association's director of engineering, said an automatic locking device secures the pin into the fifth wheel.

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During the trial, the jury was told Network Rail had failed to install an automatic barrier locking system at the site, when improvements were made in 2009, due to its expense.

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Mr Mott told the court although it may be a case of "human error", Maund's former employer Network Rail was equally culpable for Mrs Harding's death because it had not fitted an automatic-locking device at the Moreton-on-Lugg crossing as part of improvement works there.

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"Automatic renewal was locking some consumers into services that were no longer suitable for their requirements and were often less competitively priced than newer offerings, " he said.

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