Stagecoach MCSL - Gillmoss Depot

[Mayneway]

RE: Stagecoach Merseyside - Gillmoss Depot
This might not be the right thread as I'm not sure which depot it's allocated to but while at a rather muddy Parklife in Manchester at weekend noticed 17549 On shuttles sticking out like a sore thumb still looking very much like a London bus. I seem to remember this and others were initially used on a long term rail replacement contract but how come its never been treated to a lick of paint? And is it the only one of the commonwealth games batch (as I call them) to still remain in overal red?