Faster trains between Swansea and London could be running by 2018. The line's electrification is part of an almost one billion pound plan by Network Rail to upgrade the country's railways. Improvements are also planned for the route along the north Wales coast. Here's Carl Edwards.
More top news
Gravitational waves were predicted by Einstein but have never been spotted. Welsh physicists are modelling their astronomical sources.
Fly-half Dan Biggar remains on the road to recovery ahead of Wales' Six Nations clash against Scotland this weekend.
Manufacturers and unions have accused ministers of failing to protect the steel industry from cheap Chinese imports.