A report from consultants Credo, in association with the Campaign for Better Transport, claims there are "huge disparities" in the quality of train services in different regions of Britain.
In Wales they're less well-used, less accessible and have low satisfaction levels.
A spokesman for the Rail Delivery Group, which speaks on behalf of the rail industry, said:
"While there is always room for improvement, rail passengers are travelling on services that are unrecognisably better when compared to 15 years ago".
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