Testing was planned to occur with a lipped chimney, and on receipt of the first full livery, "Tornado" would be fitted with an authentic rimless chimney, described as the original non-capped version. The fluted chimney intended for apple green running was still not fitted at the time of the green livery launch on 13 December, due to it still being machined at the manufacturer. It was completed and fitted in time for the inaugural main line passenger run. The locomotive chimney would also be fitted with a spark arrestor. The locomotive number on the smokebox door may be moved higher up as was "once the norm" (requiring the moving of the lamp-bracket). Moving the number plate above the smokebox door hand-rail was confirmed as being intended at the time of "Tornado's" unveiling at the NRM. "Tornado" would also be fitted with a chime whistle from an A4 class locomotive.