A report commissioned by Wiltshire Council last year has been completed, and the findings, related to the potential Corsham train station, published.
A predicted 400,000 passengers could travel from Corsham station each year, with the initial number increasing as later developments are rolled out. 330,000 passengers could utilise a railway station at Royal Wootton Bassett.
Four possible service options have been tested. These services are from Bristol Temple Meads to Swindon; a new line between Bristol Temple Meads and Oxford; a service from Cardiff Central to Swindon; and an extension on the line from Bath Spa to Chippenham. The estimated annual operating costs of these four services exceed the predicted annual revenue generated for roughly two decades.
A direct London service is not possible due to wider industry ambitions in regards to improving Great Western mainline intercity services.
Adding Corsham and Royal Wootton Bassett stops to train services will significantly increase revenue, particularly for the Bristol to Oxford service.
The next stage is demonstrating the suitability of train services in the area.