Network Rail has rejected a Freedom of Information request to disclose details of discussions over a possible tram-train link at Glasgow Airport.

Local media reports that NR rejected the request by saying it was ‘“not in the public interest” to make a full disclosure of its communications with the Glasgow Airport Access Project, adding that the call for transparency was outweighed by a greater need for privacy.

NR reportedly believes that revealing the content of emails and other correspondence would make those involved less likely to express contentious views in future for fear of criticism, thereby seriously undermining the process of liaison.

NR’s stance comes amid mounting scepticism surrounding the feasibility of the £144 million project, and the availability of spare capacity at Glasgow Central station to handle increased traffic from train-trams.

The non-disclosure made under the Freedom of Information Act is expected to be legally challenged.