When TOPS class numbers were applied, these units mostly retained their existing numbers as the last three digits of their new TOPS class number.
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The table below lists all the units numbered in the Class 931 series, together with the route learning and stores units used by the SR prior to the application of TOPS numbers.
British | British Columbia | British Army | Order of the British Empire | British Museum | British Empire | British people | British Raj | British India | University of British Columbia | British Airways | British Council | British Isles | British Indian Army | British Malaya | British Library | British Royal Family | British Armed Forces | British Rail | British and Irish Lions | Rail transport | British Columbia Interior | British Aerospace | British Film Institute | Legislative Assembly of British Columbia | British Academy of Film and Television Arts | light rail | Edmonton Light Rail Transit | British Virgin Islands | British sitcom |