Improved signalling, station improvements and faster trains are among the measures planned by Network Rail. Work to electrify the line between the Severn Tunnel and Swansea should be complete by December 2018, paving the way for bigger, faster and more environmentally-friendly electric trains.
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ITV Cymru Wales will publish the final poll of the Welsh Assembly Election 2016 campaign on Wednesday this week.
A mostly cloudy day with outbreaks of light rain and drizzle at times, mainly over the mountains where it could occasionally turn heavy.
The parents of a young boy from Anglesey say they're determined to find a missing dog that was bought to aid his recovery from surgery.