Changes

For rolling stock inherited from the ‘Big 4’ at nationalisation, BR initially retained the same number but allocated a prefix according to where it originated ('''E'''=LNER, '''M'''=LMS, '''S'''=Southern, '''G'''=GWR). Generally the SVR portrays its rolling stock from the ‘Big 4’ era in the original livery without this prefix<ref>[https://en.wikipedia.org/wiki/British_carriage_and_wagon_numbering_and_classification Wikipedia]</ref>

From 1951, new BR carriages were given a prefix to indicate the region to which the carriage was allocated (a carriage could have carried more than one prefix if transferred between regions during service):<ref>[[Bibliography#Other References|Longworth (2013)]] p.8.</ref>*'''E''' =Eastern Region, GE=Great Eastern lines, region*'''M''' =London Midland Region, NE=North Eastern Region, region*'''S''' =Southern Region, region*'''SC''' =Scottish Region, region*'''W''' =Western Regionregion*'''NE''' = North Eastern region (carriages began with an E prefix, later changing to NE, and reverting to E when the North Eastern region merged into the Eastern region in 1968). *'''GE''' = Great Eastern electrified lines within the Eastern region, carried for a time in the 1960s Although normally referred to by number alone, BR era carriages on the SVR carry this prefix (a carriage could have carried more than one prefix if transferred between regions. The  From 1951, the inherited carriages also received a similar prefix, with a suffix being used to indicate the region of origin. An Generally the SVR portrays its rolling stock from the ‘Big 4’ era in the original livery without this prefix, although an example of the latter type of numbering may be seen on [[GWR 80972 Inspection Saloon]] which carries the number W80972W.