There have been renewed calls to run more trains between Birmingham and Wales.
There is currently only a service every two hours to Aberystwyth, campaigners say a train to the West Midlands every hour would boost the region's economy.
A public consultation is due to end this week.
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The 26-year-old neighbourhood officer had been deployed along with his team as part of a pre-planned arrest attempt.
Evening rain, sleet and hill snow clearing. Icy patches possible.
Rain spreading east overnight. Blustery showers tomorrow.