British Rail TOPS First Arrangement - Electric Multiple Units

Electric Multiple Units

The first attempt to apply TOPS to the Southern Region's fleet of electric multiple units, saw classes being allocated according to the following division:

40x: Southern Railway designed units 41x: 1951-type British Railways designed units 42x: 1957-type British Railways designed units 43x: 1963-type British Railways designed units 44x: 1967-type British Railways designed units 45x: Underground ('Tube'-sized) units 46x: 1971-type British Railways designed units

In comparison with the later re-arrangement, it is worth noting that types that were different were given the same class (e.g. the single-car luggage vans) and identified only by sub-class, while those that were later treated as variations of the same class, were separated according to their construction period (e.g. early or late 1950s builds). When the new arrangement was applied, 40x classes were left untouched, but the others were changed as follows:

SR code	First TOPS	Second TOPS
4-EPB	411	415/1
2-HAP	412	414/1 & 414/2
2-EPB	413	416
4-CEP	414/1	411/1
4-BEP	414/2	410/1
4-CEP	421/1	411/2

SR code	First TOPS	Second TOPS
4-BEP	421/2	410/2
MLV	422/1	419
TLV	422/2	499
4-EPB	423	415/2
2-HAP	424	414/3
4-CIG	431/1	421

SR code	First TOPS	Second TOPS
4-BIG	431/2	420
4-VEP & 8-VAB	432	423 & 480
4-REP	441	430
3-TC	442/1	492
4-TC	442/2	491

SR code	First TOPS	Second TOPS
3-TIS	451	486
4-VEC	452	485
WC	453	487
2-PEP	461	446
4-PEP	462	445

British railway rolling stock numbering and classification systems

Locomotives and multiple units	British Rail and post-privatisation companies British Rail - regional multiple unit numbering British Rail - first TOPS arrangement Great Western Railway London, Midland & Scottish Railway London & North Eastern Railway Southern Railway - locomotives Southern Railway - multiple units

Carriages and wagons	British carriage and wagon numbering and classification London Underground rolling stock numbering and classification

Read more about this topic: British Rail TOPS First Arrangement

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