Note On Classification
Carriage and wagon classification has never been quite the same as locomotive and multiple unit classification. For most railways, specific types were identified by their Diagram Number. This could simply be arranged by consecutive number, or there could be some greater organisation of numbers so that similar types were grouped together.
However, carriages and wagons have rarely been referred to in general terms by their Diagram Number. Instead, there have been a variety of other codes and designations, which have referred to generic designs rather than specific types. For instance, there were the BR (adapted from the LNER system) and LMS carriage codes, which indicated interior layout or usage. The GWR identified their non-passenger carriages and wagons through a series of animal designations, including sealife for departmental (non-revenue earning) stock, followed by a letter to illustrate detail differences, e.g. Beetle A.
Therefore the majority of the sections below deal solely with carriage and wagon numbering series, though where a particular classification system was used, this is also described.
Read more about this topic: British Carriage And Wagon Numbering And Classification
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