(10 Nov 2015, 7:38 pm)S813 FVK wrote Is it though? I always reported 5337/8 on Diamonds but eventually, after a while (and numerous people complaining), I realised that as the vehicles are to the same specification as the normal allocation, it isn't rare or odd at all. 7518 is a dedicated Sapphire spare vehicle in Sapphire livery, the X21/X22 are a Sapphire route, therefore, i don't see how it is a rare/odd working at all.
7515/7516 and 7518 are all-route spares which carry MAX or Sapphire branding to avoid brand dilution. These vehicles do not form part of the usual allocation (route branded vehicles) unless they are operating extra capacity.
It can't be classed as a correct allocation as 7501-9 and 7522-8 are the correct allocation.