Question Author
Sigh... why are people so convinced flights are cheaper?! I just checked; the cheapest option came in about £20 more than a pair of advance 1st class rail day service tix, not including the costs of getting and to and from one of the more remote London airports from where I am, nor the Edinburgh airport transfers. Then outside of mere costs, there's the added hassle of the procedures of air travel that you don't get with rail. No, paying less to walk to the station and sit in a nice 1st-class seat while being fed and watered, without security checks etc and long and costly transfers either end, is a no-brainer. "Knickers", if that's the permissible word, to the sleeper and to flights.