What's the cheapest option for an off-peak single from Glasgow to Edinburgh via Alloa, Stirling and Falkirk? £7.70 and £8.45 for off-peak singles for Glasgow Queen Street to Alloa and Alloa to Edinburgh with a 16-25 railcard comes to £16.15; is there a cheaper option? I also want to take some buses in Falkirk so I think PlusBus would be the cheapest option (£2.45 for a total of £18.60); could I ask for a PlusBus ticket with an Alloa to Edinburgh one or would I need to split the ticket at Falkirk?