The class numbers shown are those first given when TOPS was introduced in the late '60s. In the late '70s they were all re-classified as simply Class 105s.

In later years, the 50xxx vehicles were renumbered into the 53xxx series, as were 56xxx vehicles which became 54xxx. This was to avoid clashing with Class 50 and 56 locos on TOPS.

The NE prefix was only carried for a brief period by some vehicles.
Number Class Type Seats Introduced Region Formation Batch Weight Lot No. BR Diagram
50249 105/2 DMBS 52 2nd 1959 NE   5th 30tons 10cwt 30505 548
50359-72 106/2 DMBS 52 2nd 1956 NE Power Trailer 1st 29tons 30280 525
50373-89 105/2 DMBS 52 2nd 1957 NE Power Trailer 1st 29tons 30282 525
50390-4 105/2 DMBS 52 2nd 1957 LM Power Trailer 1st 29tons 30284 525
50752-70 105/2 DMBS 52 2nd 1957 LM 3 car 2nd 30tons 30352 528
50771-84 105/2 DMBS 52 2nd 1957 LM Power Twin 2nd 30tons 30352 528
50785-803 105/1 DMCL 12 1st + 51 2nd 1957 LM 3 car 2nd 30tons 30353 529
50804-17 105/1 DMCL 12 1st + 51 2nd 1957 LM Power Twin 2nd 30tons 30353 529
51254-301 105/2 DMBS 52 2nd 1958 E Power Trailer 3rd 30tons 30469 532
51471-72 105/2 DMBS 52 2nd 1959 E Power Trailer 4th 30tons 10cwt 30503 548
51473-94 105/2 DMBS 52 2nd 1959 Sc Power Trailer 4th 30tons 10cwt 30503 548
56114-27 141 DTCL 12 1st + 51 2nd 1956 NE Power Trailer 1st 23tons 30281 526
56128-44 141 DTCL 12 1st + 51 2nd 1957 NE Power Trailer 1st 23tons 30283 526
56145-9 141 DTCL 12 1st + 51 2nd 1957 LM Power Trailer 1st 23tons 30285 526
56412-59 141 DTCL 12 1st + 51 2nd 1958 E Power Trailer 3rd 24tons 30470 533
56460-1 141 DTCL 12 1st + 51 2nd 1959 E Power Trailer 4th 24tons 30504 549
56462-83 141 DTCL 12 1st + 51 2nd 1959 Sc Power Trailer 4th 24tons 30504 549
59307-25* 170 TCL 12 1st + 51 2nd 1957 LM 3 car 2nd 23tons 30354 530
* 170 TSL 69 2nd (vehicles 59308/9/11-5/9/23-5)
Original Set Formations
Power Trailers            
Class 106 DMBS 50359-72 paired with DTCL 56114-27 for NER
Class 105 DMBS 50373-94 paired with DTCL 56128-49 for NER/LMR
Class 105 DMBS 51254-301 paired with DTCL 56412-59 for ER
Class 105 DMBS 51471-94 paired with DTCL 56460-83 for ER/ScR
Power Twins            
Class 105 DMBS 50771-84 paired with DMCL 50804-17 for LMR
3-car Sets            
Class 105 DMBS 50752-70 + TCL 59307-25 + DMCL 50785-803 for LMR

Generally vehicles stayed in their original formations until about 1971, but by 1975 this was the exception rather than the rule.