Except it won't rattle the 100.
Go North East already run more buses per hour between Metrocentre and Newcastle than the 100.
Go North East won't win any more passengers off the 100, because the vast majority of passengers that use the service have Stagecoach day / weekly / monthly tickets having travelled into Newcastle on other Stagecoach services from places like Killingworth, Byker, Walker, Heaton etc. And places in the West End that isn't covered by the 6 or 7.
