A question of general interest - what is the logic behind the numbering of the ALX300s? I'm interested in those buses in particular as I quite like them. Why is it that 03/53-registered examples are numbered 220xx as an example, whereas T-reg and other pre-2000 examples are 222xx and 226xx. Also; some of the 223xx and 224xx batch are as new as 2005 and 2006. Anybody able to explain it to me? Nothing appears to be in order, in terms of age and the registrations of the vehicles.