RE: Go North East: Upcoming Service Changes
I think there would be no option other than to add on extra buses over the busiest period, anyhow, simply to cope with delays caused by increased traffic, even before considering passenger volume. IIRC It happened most years when I was using the service regularly for at least the busiest parts of the day - back in the lpg bus days before the bendybuses there would be non-lpg buses added, though not deckers as they would have had to go the long way round as the quick way before the new bus station involved that low bridge that seems to spend half the year flooded or being repaired, now.