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22:29, 6 December 2015 BR used a system for identifying carriage types using alphabetical codes, based on that previously used by the LNER. The notes below relate to carriages found on the SVR.
==Carriage class and internal layout==
For passenger carriages, one letter indicated the class of carriage, normally F (First), S (Second, later Standard), T (Third) or C (Composite, ie more than one class). A second letter would indicate the layout, typically O (Open) or K (Corridor). Thus a carriage with Third Class compartments off a corridor would be designated TK.
The letter T when used as a prefix to another carriage class meant ‘Tourist’, indicating 2+2 seating, for example TSO (Tourist Standard Open).
==Guard's compartment==
The code for carriages including a guard’s compartment would be prefixed by B (Brake), for example BTK. A carriage with a guard’s compartment and a through gangway for passenger access, but with no passenger seating was designated BG (Brake Gangwayed). A specialised form, BGP, indicated a Pigeon-van.
==Restaurant carriages==
Carriages with catering facilities, or whose principal use was for dining, were normally prefixed R (Restaurant). B as a suffix indicated Buffet. Common forms included RB (Buffet with cooking facilities) and RMB (Restaurant Miniature Buffet, serving snacks).
==Other variants==
The suffix Z indicated a 6-wheeled vehicle (for example the [[Barry Railway Carriage 163 | Barry Railway Composite coach]] is designated CZ).
Certain letter combinations were entirely descriptive; these included ROY (Royal Coach), INSP (Inspection Saloon), SLEP (Mk 3 Sleeper), GUV (General Utility Van) and POS (Post Office Sorting)
==See also==
[[Carriages | List of Carriages]]