The station was closed for two weeks in September 2017 to allow for upgrade work as part of the electrification and upgrade work for the Great Western route. Works included resignalling, installation of overhead electrification gantries, and the start of construction of a new fourth platform on the south side of platform 2. The new platform 1 took over an existing goods loop, allowing trains towards Bristol and towards Wales to be accommodated at the same time, thus easing a bottleneck. It was opened on 13 April 2018 by Chris Grayling MP, Secretary of State for Transport. The other platforms were lengthened to at the same time. The station closed for three weeks in Autumn 2018 for further electrification works, including the installation and testing of overhead wires.