DM Motor Services seem to have allocated 3 vehicles to its outstation in Seghill to cover a PVR of 2 vehicles. These are....

DW3 - LJ09SSO - VDL DB300 - Wright Gemini 2DL
MEC1 - DMZ1624 - Mercedes Benz O530 Citaro (Ex BJ10VUO - Ex Go North East 5329)
VWL2 - DMZ1621 - Volvo B7RLE - Wright Eclipse 1 (Ex YJ08CFE)

Services are...
392 - Marden to Longbenton DWP (AM / PM)
442 - St Thomas More HS to West Monkseaton (PM Only)
678 - Hadrian Lodge Wiltshire Drive to St Thomas More HS (AM Only)
680 - Killingworth Bus Station to St Thomas More HS (AM Only)
687 - St Thomas More HS to Wallsend High Street East / Wagon Way (PM Only)

The vehicle that operates the 678 / 687 also does the 392.