(23 Apr 2015, 4:36 pm)tyresmoke wrote Where is "Up to every 30 minutes" ?
The combined frequency for those customers travelling between the main calling points (Sunderland, Chester-le-Street and Stanley) is every 15. Because the routes of each service differ between those calling points (even more so following routing changes late last year between Washington and Sunderland on service 8), it was more appropriate to advertise the service as 'up to every 30' (ie the frequency of each route separated).
At peak times, four buses per hour are provided on service 8, but this is between Washington Galleries and Waterview Park only (an 8 minute journey time).