People would pay good money for such a railtour in a classic
HST▸ or with D1000/50XXX hauling some rattly old MkI stock
I might pay good money for such a railtour, but would be less impressed if expecting a sleeper by a reasonably direct and punctual route. In view of the relatively early morning arrival of the sleepers, minor delays of up to say 30 minutes are in my view of little consequence for most passengers, and longer delays of up to an hour arguably acceptable.
Railtours are noted for the provision of booked seats, padded seats, buffet cars, proper first class and other facilities that are considered unreasonable to provide on new trains.