Registration plates
The first 900 members of the NBFL fleet carry registration plates of LTZ 1xxx, where xxx is the numerical part of the fleetnumber, with leading zeros (e.g., LT1 is LTZ 1001). The last hundred have been allocated registrations LTZ 2101-2200, leaving LTZ 1901-2100 vacant. TfL were given special dispensation to use this unusual format - while the Northern Irish 3 letter 4 digit format is used in Great Britain, the LTZ series was not due to be issued for another 10 years. This LTZ scheme was only adopted in 2012, after several buses were already in service. The eight pre-production prototypes (LT1-LT8) were originally allocated plates in the the post 2001 standard GB format - LJ61 CJE (worn by LT1 when first unveiled in Northern Ireland); LT61 A/B/CHT (worn by LT1/2/3); LT12 D/E/F/G/HHT (worn by LT4/5/6/7/8). Five of the eight protoypes, LT4-LT8 (the only ones still operating in London in 2013) were subsequently re-registered into the LTZ series. Additionally, four of the earliest production buses (LT9 onwards) initially wore standard plates (LK13 FJE/J/F/N, on LT10/11/12/16), but these have also since been changed. The design mock-up (MN0123) wore the fictional plate BU12 HHJ.