(New fleet numbers from 500
to 599)
Numbered in age sequence
| New | Old | Reg.No. | Type | Comments |
| 501 | 813 | HHR943E | Bedford VAM 14 | Strachans |
| 502 | 814 | HWV326E | Bedford VAM14 | Willowbrook |
| 503 | 815 | LMR735F | Bedford VAM70 | Willowbrook |
| 504 | 816 | LMR736F | Bedford VAM70 | Willowbrook |
| 505 | 817 | LMR737F | Bedford VAM70 | Willowbrook |
| 506 | 818 | LMR738F | Bedford VAM70 | Willowbrook |
| 507 | 819 | LMR739F | Bedford VAM70 | Willowbrook |
| 508 | 820 | LMR740F | Bedford VAM70 | Willowbrook |
| 521 | 835 | REL746H | Bristol LH6L/ECW | ? |
| 522 | 836 | REL747H | Bristol LH6L/ECW | ? |
| 523 | 837 | REL748H | Bristol LH6L/ECW | ? |
| 524 | 838 | RRU692H | Bristol LH6L/ECW | ? |
| 525 | 839 | RRU693H | Bristol LH6L/ECW | ? |
| 526 | 840 | RRU694H | Bristol LH6L/ECW | ? |
| 527 | 848 | TRU227J | Bristol LH6L/ECW | withdrawn 12/81 |
| 528 | 849 | TRU228J | Bristol LH6L/ECW | to AP{T(Q) 11/82 |
| 529 | 850 | UEL567J | Bristol LH6L/ECW | withdrawn 12/81 |
| 530 | 851 | UEL568J | Bristol LH6L/ECW | to APT (Q) 11/82 |