(04 Aug 2015, 10:39 pm)Davie wrote Service 28 used to be the 721 too, service X25 used to be the 725/726 then 25/25A
(04 Aug 2015, 10:54 pm)R852 PRG wrote Are you sure? I recall being told it was an amalgamation of some services. 721 was Chester-le-Street - Birtley - Wrekenton - Gateshead - Newcastle according to the Bygone Era.
The 28 is an amalgamation of the 739/40 (between Chester and Grange Villa), 728 (between Grange Villa and Eighton Lodge) and 721/777 (Eighton Lodge - Newcastle).