Out of interest, what train runs from Belfast to Glasgow?
National Rail / Stena Line via Ayr & Cairnryan, takes five hours, three connections daily, walk-up fare is £29 one way. Don't knock it, it's saved my skin a few times (although it's a shame the new port at Cairnryan requires a bus from Ayr; Stranraer station was beside the ferry terminal).
Interestingly enough, the walk up train fare for London - Belfast (change at Glasgow) is £52. Walk up train fare for London - Glasgow is about double that.
