When it came to overall customer satisfaction levels, Heathrow Connect came in the top three at 94%. But the same operator saw a marked fall in its value for money rating - dropping 6% over the last year to 52%.
First Capital Connect (81%) and Southern (82%) were among the lowest-rated for overall satisfaction - at 81% and 82% respectively.
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As soon as the information went missing in early January, the Ministry of Justice say they launched an urgent investigation.