As I think I've explained elsewhere before (or if I haven't, here it is), Middlesbrough Council (who of course own the bus station) have a 5 minutes between departure rule, plus Adam, your suggestion clashes with the departure time of the X10 so would likely result in your version of the X8 being put on the stand in-front of the X1/X10 stand. Likewise Tom, as yours happens to depart 2 minutes in-front of an X1 (I wonder why that is
) it would also have to be placed on the unused stand 19 instead of stand 18 along with everything else express wise to Peterlee, Durham, Sunderland and Newcastle (and not so express in the case of the 21a).