I think,
Cruasder could get Volvo 7900h would be suited nicely.
Coaster could get E400MMC or Volvo wright streedecker's moving scania omnicity buses to Cruasder and transfering citraos to loop or to 20/A/X20.
For X21 they could get MetroDecker or Scania E400.
RE: Go North East: 2015/16 Financial Year Order Predictions