(18 Feb 2016, 8:48 pm)Kuyoyo wrote The quoted post above might answer that. It all depends how things are parked. In the case of 7518 being out on a Sunday instead of a branded example, it could be that 7518 was parked at the front of the Sapphire line and so was the easiest to get out.
Well there we go, proof that it isn't all about allocating a bus to the wrong route for the sheer hell of it. Think this model should only be used with breakdowns though but still, it should help people understand why buses being allocated to the wrong routes rather than being quick to criticise the company for doing so.