My tutor apparently saw a Mercedes Vario/Wright StreetLite/Optare Solo (after searching through NEB's fleet lists, they were the types of bus that she thought looked like the bus/coach that she saw) with "Pixie" in blue lettering. She saw it (apparently) at the Wansbeck Hospital roundabout (of which the 1 turns around and the X21 uses).
Thanks.
RE: Unknown local spottings / Unknown operator questions