The British Rail Class 01 diesel locomotive is a short wheelbase 0-4-0 diesel-mechanical design intended for use in areas with tight curves and limited clearance.

Andrew Barclay Sons & Co., currently operating as Brodie Engineering, is a railway engineering company, specializing in the heavy maintenance, refurbishment and overhauls for both passenger and freight rolling stock. Based around its works at Kilmarnock, it is the only active rail engineering business in Scotland.