Duncan led a group of 10 MPs to meet with Secretary of State for Transport, Patrick McLoughlin MP and present their case for a new direct rail service between Oxford and Bristol.
The proposed route would connect Bristol, Bath, Chippenham and Swindon to Oxford and Bedford, and is the key to unlocking the campaign to re-open Corsham station.
The Secretary of State agreed to consider the case made by Duncan and the other nine MPs, and said he would write to them setting out whether and how the new Great Western franchise could meet the aspirations of their constituents.
During the meeting, there was an extensive discussion of the improvements to the railway that a direct Oxford to Bristol service could facilitate, including opening stations at Corsham and Royal Wootton Bassett.
Officials from the Department for Transport also reflected on the benefit of running services that would connect this part of the railway with the East-West Rail project (trains from Oxford to Bedford and Milton Keynes, and eventually Cambridge), which the Government has recently backed.
The group of 10 MPs wrote a joint letter to Transport Secretary Patrick McLoughlin in September, urging him to introduce an Oxford to Bristol service and requesting a meeting with him to discuss it. Duncan then secured an agreement from Mr McLoughlin to meet with them in response to a Parliamentary Question last month.