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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The parents of Dylan Seabridge, from Pembrokeshire, said they believed their son was suffering from growing pains.
A cold and windy day across Wales with sunny spells and showers of rain, sleet and snow
An inquest is to be held into the deaths of four family members who died when their car was involved in a crash near Aberystwyth in June.