(28 Jul 2015, 8:04 pm)citaro5284 wrote Coaches were used on the X10 when it was jointly operated with United along with the X1 (at the time), when Chester ran it.Don't forget the Metrobuses that Chester used.
The duty was something like X1 from Chester to Newcastle, X10 to Middlesboro and back to Newcastle, then X1 back to Chester.
Uprated engines and coach seating on the Cxxx OCn examples.