BR leaflet "Signalmen's Additional Instructions Applicable in Track Circuit Block Areas", dated Waterloo, 4 June 1988. Marked "To be inserted in Train Signalling Regulations cover (BR 30062)" Signalmen's Additional Instructions Applicable in Track Circuit Block Areas
BR leaflet "Four Character Train Numbering System - Southern Region" dated Waterloo, May 1987. R.321. Four Character Train Numbering System - Southern Region
BR leaflet "Four Character Train Numbering System - Southern Region", dated Waterloo, May 1988. Four Character Train Numbering System - Southern Region