DMU Lot Numbers

Lot numbers were issued to coaching stock as a means of identifying build lots.

They normally defined a vehicle type in an order. As an example if three-car sets were ordered from a builder each of the three vehicle types in that order would receive it's own lot number. If later on further identical vehicles were ordered they would receive different lot numbers. Different lots could belong to the same diagram but, with one exception, each lot only contained one diagram type.

Lot numbers were issued in numerical order, where sets were delivered with non-consecutive lot numbers is evidence that the order was changed between placement and delivery.

The lot numbers were carried on a plate on the solebar (as the example in the image) which also identified the builder. The workplates images are mainly from the collections of Simeon Gaskell, John Horne and Tony Spencer. Do you have one that is not featured here? Please send me a picture!

Lot Number		Type	Qty	Diagram	Numbers
30084		Derby Lightweight	8	501	79000 - 79007
30085		Derby Lightweight	8	507	79500 - 79507
30123		Derby Lightweight	13	503	79008 - 79020
30124		Derby Lightweight	13	509	79600 - 79612
30126		Derby Lightweight	13	504	79021 - 79033
30127		Derby Lightweight	13	505	79613 - 79625
30128		ACV / BUT Railcar	3	500	79740 - 79742
30174		ACV / BUT Railcar	2	506	79743 - 79744
30175		ACV / BUT Railcar	1	506	79745
30176		ACV / BUT Railcar	2	506	79746 - 79747
30177		Derby Lightweight	13	504	79034 - 79046
30178		Derby Lightweight	13	505	79250 - 79262
30190		Met-Camm Lightweight	36	591	79047 - 79082
30191		Met-Camm Lightweight	29	593	79263 - 79291
"		"	7	594	79626 - 79632
30192		Derby Lightweight	5	502	79508 - 79512
30193		Derby Lightweight	5	518	79150 - 79154
30194		Derby Lightweight	5	508	79325 - 79329
30195		Derby Lightweight	5	517	79400 - 79404
30196		Swindon 79xxx series	9	550	79083 - 79090, 79095
30197		Swindon 79xxx series	8	560	79440 - 79447
30198		Swindon 79xxx series	13	570	79470 - 79482
30199		Swindon 79xxx series	14	551	79155 - 79168
30200		Swindon 79xxx series	20	552	79091 - 79094, 79096 - 79111
30201		Derby Lightweight	7	633	79143 - 79149
30202		Derby Lightweight	7	642	79663 - 79669
30209		Class 114	48	516	50001 - 50048
30210		Class 114	49	641	56001 - 56049
30211		Class 116	42	553	50050 - 50091
30212		Class 116	32	555	59000 - 59031
30213		Class 116	42	554	50092 - 50133
30214		ACV / BUT Railcar	1	506	79748
30215		ACV / BUT Railcar	1	506	79749
30216		ACV / BUT Railcar	1	506	79750
30235		Derby Lightweight	9	633	79118 - 79126
30236		Derby Lightweight	9	509	79639 - 79647
30240		Derby Lightweight	14	633	79127 - 79140
30241		Derby Lightweight	14	509	79648 - 79661
30246		Derby Lightweight	2	633	79141 - 79142
30247		Derby Lightweight	1	642	79662
30248		Class 111	4	520	50134 - 50137
30249		Class 101	14	618	50138 - 50151
30250		Class 101	7	622	59042 - 59048
30251		Class 101	7	626	59049 - 59055
30252		Class 101	6	523	50152 - 50157
30253		Class 101	6	620	50158 - 50163
30254		Class 101	4	523	50164 - 50167
30255		Class 101	4	620	50168 - 50171
30256		Class 101	26	620	50172 - 50197
30257		Class 101	13	623	59060 - 59072
30258		Class 101	13	627	59073 - 59085
30259		Class 101	12	523	50198 - 50209
30260		Class 101	12	630	56050 - 56061
30261		Class 101	24	523	50210 - 50233
30262		Class 101	24	630	56062 - 56085
30263		Class 101	12	619	50234 - 50245
30264		Class 101	6	622	59086 - 59091
30265		Class 101	6	626	59092 - 59097
30266		Class 101	10	523	50250 - 50259
30267		Class 101	10	621	50260 - 50269
30268		Class 111	10	616	50270 - 50279
30269		Class 111	10	623	59100 - 59109
30270		Class 101	7	523	50290 - 50296
30271		Class 101	7	621	50745 - 50751
30272		Class 101	4	630	56086 - 56089
30273		Class 101	5	623	59302 - 59306
30274		Class 101	2	627	59112 - 59113
30275		Class 101	18	523	50303 - 50320
30276		Class 101	18	621	50321 - 50338
30277		Class 101	18	624	59114 - 59131
30278		Class 100	20	536	50339 - 50358
30279		Class 100	20	537	56094 - 56113
30280		Class 105	14	525	50359 - 50372
30281		Class 105	14	526	56114 - 56127
30282		Class 105	17	525	50373 - 50389
30283		Class 105	17	526	56128 - 56144
30284		Class 105	5	525	50390 - 50394
30285		Class 105	5	526	56145 - 56149
30286		Class 103	20	635	50395 - 50414
30287		Class 103	20	645	56150 - 56169
30288		Class 109	5	606	50415 - 50419
30289		Class 109	5	607	56170 - 56174
30290		Class 104	4	556	50420 - 50423
30291		Class 104	4	558	50424 - 50427
30292		Class 104	4	582	59132 - 59135
30293		Class 104	52	556	50428 - 50479
30294		Class 104	52	558	50480 - 50531
30295		Class 104	52	582	59136 - 59187
30296		Class 104	10	556	50532 - 50541
30297		Class 104	10	585	56175 - 56184
30298		Class 104	42	580	50542 - 50583
30299		Class 104	21	583	59188 - 59208
30300		Class 104	21	584	59209 - 59229
30301		Class 104	10	580	50584 - 50593
30302		Class 104	5	583	59230 - 59234
30303		Class 104	5	584	59240 - 59244
30321		Derby Lightweight	13	633	79169 - 79181
30322		Derby Lightweight	15	511	79670 - 79684
30324		Derby Lightweight	5	633	79184 - 79188
30325		Derby Lightweight	5	510	79189 - 79193
30334		Class 120	49	586	50647 - 50695
30335		Class 120	49	587	50696 - 50744
30336		Class 120	47	561	59255 - 59301
30337		Class 111	4	628	56090 - 56093
30338		Class 111	10	524	50280 - 50289
30339		Class 101	3	522	50246 - 50248
30340		Class 101	3	629	56218 - 56220
30341		Derby Heavyweight	1	632	50000
30342		Derby Heavyweight	1	641	56000
30352		Class 105	33	528	50752 - 50784
30353		Class 105	33	529	50785 - 50817
30354		Class 105	19	530	59307 - 59325
30363		Class 116	53	553	50818 - 50870
30364		Class 116	53	554	50871 - 50923
30365		Class 116	51	555	59326 - 59376
30368		Battery Multiple Unit	1	406	79998
30369		Battery Multiple Unit	1	442	79999
30380		Derby Lightweight	1	514	79900
30385		Class 116	10	600	59032 - 59041
30387		Derby Lightweight	1	515	79901
30404		Class 104	5	557	50594 - 50598
30405		Class 104	5	581	56185 - 56189
30406		Class 108	26	543	50599 - 50624
30407		Class 108	5	543	50625 - 50629
30408		Class 108	17	544	50630 - 50646
30409		Class 108	21	640	56190 - 56210
30410		Class 108	5	640	56211 - 56215
30411		Class 108	6	547	59380 - 59385
30412		Class 108	6	546	59245 - 59250
30413		Class 126	22	551	50936, 51008 - 51029
30414		Class 126	22	608	51030 - 51051
30415		Class 126	10	570	59391 - 59400
30416		Class 126	11	571	59402 - 59412
30418		Class 129	3	531	55997 - 55999
30419		Class 122	20	539	55000 - 55019
30420		Class 122	9	538	56291 - 56299
30421		Class 119	28	540	51052 - 51079
30422		Class 119	28	541	51080 - 51107
30423		Class 119	27	542	59413 - 59437
30444		Class 100	20	536	51108 - 51127
30445		Class 100	20	537	56300 - 56319
30446		Class 116	13	553	51128 - 51140
30447		Class 116	13	554	51141 - 51153
30448		Class 116	11	555	59438 - 59448
30459		Class 114	1	516	50049
30460		Class 108	12	543	50924 - 50935
30461		Class 108	12	609	51561 - 51572
30462		Class 125	20	596	50988 - 51007
30463		Class 125	20	597	59449 - 59468
30464		Class 125	20	595	51154 - 51173
30465		Class 108	50	543	50938 - 50987
30466		Class 108	50	640	56221 - 56270
30467		Class 101	80	523	51174 - 51253
30468		Class 101	80	630	56332 - 56411
30469		Class 105	48	532	51254 - 51301
30470		Class 105	48	533	56412 - 56459
30479		AC Cars Railbus	5	614	79975 - 79979
30480		Park Royal Railbus	5	613	79970 - 79974
30481		Wickham Railbus	5	612	79965 - 79969
30482		W&M Railbus	5	611	79960 - 79964
30483		Bristol Railbus	2	610	79958 - 79959
30493		Class 108	5	545	59386 - 59390
30498		Class 108	9	634	51416 - 51424
30499		Class 108	9	646	56271 - 56279
30500		Class 101	46	523	51425 - 51470
30501		Class 101	46	621	51495 - 51540
30502		Class 101	46	624	59523 - 59568
30503		Class 105	24	548	51471 - 51494
30504		Class 105	24	549	56460 - 56483
30505		Class 105	1	548	50249
30508		Class 111	10	615	51541 - 51550
30509		Class 111	10	617	51551 - 51560
30510		Class 111	4	623	59569 - 59572
30515		Class 120	8	636	51573 - 51581
30516		Class 120	9	637	51582 - 51590
30517		Class 120	10	572	59579 - 59588
30518		Class 121	16	512	55020 - 55035
30519		Class 121	10	513	56280 - 56289
30521		Class 127	60	588	51591 - 51650
30522		Class 127	30	589	59589 - 59618
30523		Class 127	30	590	59619 - 59648
30530		Class 115	30	598	51651 - 51680
30531		Class 115	15	590	59649 - 59663
30532		Class 115	15	599	59664 - 59678
30533		Class 112	25	602	51681 - 51705
30534		Class 112	25	603	51706 - 51730
30535		Class 113	25	604	51731 - 51755
30536		Class 113	25	605	51756 - 51780
30537		Class 126	2	560	59098 - 59099
30543		Class 118	15	534	51302 - 51316
30544		Class 118	15	601	59469 - 59483
30545		Class 118	15	535	51317 - 51331
30546		Class 117	42	534	51332 - 51373
30547		Class 117	39	601	59484 - 59522
30548		Class 117	42	535	51374 - 51415
30551		Class 128	6	643	55991 - 55996
30552		Class 128	4	644	55987 - 55990
30553		Blue Pullman	4	653	60090 - 60093
30554		Blue Pullman	6	654	60094 - 60099
30555		Blue Pullman	6	673	60644 - 60649
30556		Blue Pullman	4	662	60730 - 60733
30557		Blue Pullman	6	663	60734 - 60739
30558		Blue Pullman	10	664	60740 - 60749
30559		Class 120	7	587	51781 - 51787
30560		Class 120	7	586	51788 - 51794
30561		Class 120	7	561	59679 - 59685
30587		Class 101	7	523	51795 - 51801
30588		Class 101	7	621	51802 - 51808
30589		Class 101	7	624	59686 - 59692
30592		Class 110	20	564	51809 - 51828
30593		Class 110	20	563	51829 - 51848
30594		Class 110	20	648	59693 - 59712
30595		Class 115	12	598	51849 - 51860
30596		Class 115	6	590	59713 - 59718
30597		Class 115	6	599	59719 - 59724
30598		Class 115	40	598	51861 - 51900
30599		Class 115	20	590	59725 - 59744
30600		Class 115	20	599	59745 - 59764
30601		Class 108	50	634	51901 - 51950
30602		Class 108	21	646	56484 - 56504
30603		Class 124	17	577	51951 - 51967
30604		Class 124	17	579	51968 - 51984
30605		Class 124	9	573	59765 - 59773
30606		Class 124	8	562	59774 - 59781
30611		Class 107	26	639	51985 - 52010
30612		Class 107	26	649	52011 - 52036
30613		Class 107	26	647	59782 - 59807
30615		Class 111	6	625	59573 - 59578
30660		Class 108	29	638	52037 - 52065
30691		Class 110	10	564	52066 - 52075
30692		Class 110	20	563	52076 - 52085
30693		Class 110	10	648	59808 - 59817
30703		Class 123	10	566	52086 - 52095
30704		Class 123	10	574	52096 - 52105
30705		Class 123	10	567	59818 - 59827
30706		Class 123	5	568	59235 - 59239
30707		Class 123	5	569	59828 - 59832