Can I add something to the discussion on the value earned to local ecconomies by a sleeper service by way of an actual example? Last summer, Roundhouse and I, along with a couple of others, went down to Penzance on the sleeper on a Thursday night and spent a very nice long weekend spinning around the branchlines (and the pubs along those branchlines) of the west of England and south Wales on three day rover tickets. We stayed in local independent hotels on the Friday and Saturday night and injected a fair amount of our hard-earned in to the local ecconomies along the way. We had a great time, but it did cost us!
The ability to travel overnight, after a days work, was the key enabler.
If either the sleeper, or the rail rovers had not existed, the whole trip would never have taken place.
Simples. Cheers all, Bob.