I will be in Glasgow for three days in the third week of August 2011, coming from Edinburgh. I haven't booked train tickets from Edinburgh to Glasgow and for my onward journey from Glasgow to London (which I want to do by train). I have to travel from Charing Cross (Glasgow) to London (Kings' Cross). Is it possible to get tickets while I am in Edinburgh and Glasgow? Every advice seems to stress on advance booking! How is the road travel option?