This variant of the Mk3 coach was built in the early 1980s to work all the sleeper services then running. The number of these services was subsequently reduced leaving spare vehicles. Many of these have been scrapped although around 20 remain off lease. The majority of these vehicles operate the London – Inverness sleeper service, their refurbished interiors providing comfortable facilities and the HST – style bogies a comfortable ride. Some vehicles provide catering and lounge facilities further contributing to the impression of a moving hotel.