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.
More top news
Rain and drizzle will clear eastern counties this evening. Remaining mild with breaks in the cloud by dawn.
A leading vet charity warns that you could end up with a stressed, lonely or even aggressive pet if you don't care for it properly.
From pensioners to first-time buyers to public sector workers, a rundown of how today's Autumn Statement and Spending Review affect you.