TOPS Locomotive, Depot, and Pool codes

TOPS - the Total Operations Processing System - is the computer system for managing locomotives and rolling stock adopted by British Rail after 1972. Despite its great age, adoption of the franchise model on the railways, and advances in information management, the system as not been fully supplanted.

This section is a reference source on:

  • Locomotives not owned by British Rail and its successors, as represented in TOPS
  • Pool and depot codes as defined by TOPS where locomotives and multiple units may be allocated.