CrossCountry Voyagers: Due a refurbishment?

[Ash Bridge]

I know "sleeper flicker" has been suggested as a reason for the noses on early diesel classes, but never heard it mentioned in connection with coaches. As the early Mk2s were regularly doing 100mph on the WCML you'd think there would have been a chance to research this before the later ones were designed.

Apparently this was so, according to the book by Michael Harris "British Rail Mark 2 Coaches, it states that when the mk2d stock first entered service, complaints came in from passengers that the window sills were too high, and the explanation they received from BR was that the sill height and dimensions of the window had been deliberately chosen so as to blank out 'sleeper flicker' when the train was travelling at high speed.