British Rail Class 318/1

The Class 318/1 is a subclass designation applied to the original batch of Class 318 sets as built, covering the twenty-one three-car sets numbered 318250–318270 delivered to Strathclyde PTE in 1985–86. The designation was applied retrospectively to distinguish the original build from any subsequent modifications or subclass reclassifications.

For the full history, specification, and service record of the Class 318 family, see the main Class 318 entry.