A restored Corsham station is among the ambitions of TransWilts CIC, as you can see here and in the map below:
Corsham has been campaigning for reinstatement of their station, which is on the Bristol Temple Meads to London line between Bath and Chippenham. The problem is identifying a stopping service to serve the station now electrification provides a faster London service timetable. Linking Bristol with the East-West line is one long term option. A pdf copy of the presentation made to Corsham Civic Society 29th April 19 [year?] is available in the Members Area under TransWilts topics.
Source: TransWilts CIC.
Download the map (pdf document)
Friends of Suburban Bristol Railways has included a new Corsham station in its Plan for Rail.
Network Rail has prioritised the provision of intercity services on the Great Western main lines between Cardiff and Bristol Temple Meads to London Paddington. As things stand, there are no medium-term prospects of running a stopping service between Bath Spa and Didcot Parkway. The provision of a new service calling at Corsham, Royal Wootton Bassett Parkway and Wantage Grove would require an additional pair of tracks between Wootton Bassett junction and Didcot Parkway, and increased platform capacity at Swindon.