(12 Jul 2020, 2:52 pm)L469 YVK wrote I don't think he has. TBH, the big influence in the original ADL order for the X1 at the time was Wrightbus' troubles at the time.
But with ADL's soon to be at hand, Martijn to an extent is sticking by that principle if my guess is correct. X21 vehicle reliability sorted and X70/X71 benefit from more ooomph whilst streamlining the Consett diagrams and potentially eliminating a 'pointless' extension of the X30.
IIRC, the main reliability issues with the X21 were caused by the oldest StreetDecks and since the 67 plates have allocated instead reliability has already improved. The 67 plates are also much improved from a passenger perspective as they're much nicer on the motorway stretch