Mark 3 cars. Since most Mark 1 sleeping cars had been built with asbestos insulation, which was expensive to have decontaminated professionally, most were sold for scrap. Those Mark 1 sleeping cars that survive have been decontaminated and are kept for their value as museum exhibits, as much as for sleeping accommodation. No Sleeper Either class with pantry (SLEP) has survived, 1 Sleeper Composite exists with 6 Sleeper Firsts and 1 Sleeper Second. Liveries British Railways Mark I carriages have been painted in a wide range of liveries. On introduction in 1951 the carriages were painted Crimson Lake (the official Railways Executive designation), usually referred to as Crimson (BS381C:540 Crimson being the British Standard colour reference) and Cream (the combination often referred to colloquially as "blood and custard") for corridor stock and Crimson for non-corridor stock. Corridor passenger stock was normally also lined out whereas non-corridor stock was not. The term 'Carmine' is often incorrectly used as a consequence of an error made by a contemporary railway journalist and has, unfortunately, been repeated ever since. 1956 saw the first big changes, with the end of 'third class' and the return of regional colour schemes. The Western Region promptly adopted Great Western Railway chocolate and cream livery for vehicles used on its named express trains and maroon for other stock. The Southern Region reverted to green and the other regions adopted maroon. 1962 saw Southern Region adopt the now familiar yellow cantrail above first class and red above dining cars. By the end of the 1960s this was found on all carriages. In 1962 the Western Region abandoned the use of chocolate and cream. With the introduction of spray painting in 1964, the coach ends became the same colour as the bodywork. A year later the ubiquitous British Rail blue and grey was introduced with the Mark 2s, and by 1968 most non-suburban Mark I stock was blue and grey; however it wasn't until 1974 that the last maroon Mark 1 was repainted into blue and grey livery. The use of blue and grey continued until 1982 when the first experiments in new liveries occurred. During the BR blue period other changes took place - notably the last 'Ladies Only' compartments vanished in 1977. 1982 saw a proliferation of new liveries, including yellow and grey for stock that was requisitioned for engineering and maintenance work. In 1985 some carriages reappeared in