I have a one one for the 98/98A, Which I picked up on Friday in Chester le Street Travel Office and is dated from 28 July 2013, No other Travel Offices have them so far. As for the 99 I have that also, dated 2 June 2013.
All Updated Gateshead Timetables are available at Chester as can be seen in the Image attached Below(Gateshead Routes Only) Hope This Helps.
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RE: Go North East