...apparently doesn't exist. See the back of this bus:
It's in brackets under the "fly first class" banner. The Spondon Flyer is a TrentBarton bus in Derby, which services the the Spondon area of the city. I am board another bus in this picture - I wasn't standing in the middle of the bus station's bays! I haven't travelled on the Spondon Flyer yet but I'd like to at some point.