The idea of allocating all Steam locomotives certified to operate on BR as Class 98's, was devised by a member of the DM&EE Systems Group in Nelson Street Offices, in Derby, in 1984/1985. It was proposed to the Director of Operations as a means to meaningfully add Steam Locomotives to TOPS. The first locomotive to be added to TOPS was City of Truro, followed by Flying Scotsman, (4472 = 98872). TOPS numbers now appear inside the locomotive cab.