The "Super 16" document contains the schemes that have been identified by the Rail Freight Operators’ Association that would , in their view , contribute to the Eddington study's findings and have been submitted formally to the Department for Transport for inclusion in the HLOS (links below.)
http://www.rfg.org.uk/hot/?pid=3158&lsid=3281&edname=23950.htm&ped=23950http://www.freightonrail.org.uk/HotTopicsRailfreightOperatorsSuper16TopSchemes%20.htm"The core route via Eastleigh, Basingstoke, Reading and Didcot was chosen under the first round of TIF for gauge enhancement. No diversionary routes for gauge enhancement were included. These are required to provide an alternative route when the main route is closed for engineering access. Recognising the needs of Network Rail for engineering access and the future need to handle growth, gauge and capacity enhancements are required. Capacity enhancement through signalling and a passing loop between Trowbridge and Thingley are required.
The two alternative routes are:
Southampton to Basingstoke via Romsey, Laverstock and Andover
Southampton to Didcot via Romsey; Salisbury; Westbury; Melksham and Swindon
These provide alternative routes on the southern end of the Southampton to WCML core route"