(07 Jul 2015, 3:38 pm)Jimmi wrote The X7 is probably the busiest of the Sunderland - Peterlee services but I think this is in part down to it being the only GNE service between these two points and only runs hourly whereas Arriva have the 22/23 every half hour and the hourly X21 so that's 4 more buses an hour.
Not sure on the 22/23 numbers these days but I have seen some fairly busy journeys especially on the 23.
X35?