§ Mrs. DunwoodyTo ask the Secretary of State for Transport what estimate he has made of the safe operating life of mark 1 rolling stock. [1875]
§ Mr. WattsMark 1 rolling stock was built between 1951 and 1974, although the oldest stock currently in use all year round dates from 1956.
Mark 1 rolling stock was designed and constructed to have an expected life of between 30 and 40 years and is subjected to regular inspection and maintenance at planned intervals to ensure that it is suitable for service use.
There is no reduction in the level of operating safety of mark 1 rolling stock during its life provided that it is maintained appropriately.
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