(23 Aug 2015, 9:42 pm)R852 PRG wrote There is the 64 in Durham and the 64 (albeit with 64A) on Teesside. Kind of defeats your point.
They are seemingly trying to remove duplication of Express Services
(23 Aug 2015, 9:53 pm)mb134 wrote Think there was something about not wanting to duplicate 'X' services, hence why the X12 was renumbered so throughout.
Exactly, however it's more why Blyth's X4/X5 are being renumbered - as we have an X4/X5 on Teesside and it's easier to renumber the Blyth ones as there's no other linked services to renumber (likewise the X12 - was easier to renumber the 'original' X1 than the 'Best One' X1)