Just some quick info ive heard off the Northstar facebook
Northstar are back in Whickham and Sunniside and 644 is withdrawn by GNE
643 won back the contract for Northstar
Pre-purchased Go North East tickets and passes will be valid for four weeks until 16 August . After you'll need to purchase Nexus day and week tickets for service 643
Service 643 is unable to serve stops on Burnthouse Lane or Broadway beetween 08:00 & 16:00 while Gateshead council carry out essential maintenance . Buses will operate via Sunniside Road serving all stops on the diversionary route , and then operate via Kingsway anti clockwise
RE: Northstar