British Rail Class 931

The British Rail Class 931 was reserved for former Southern Region electrical multiple units converted for departmental use. Originally the series was reserved for Route Learning and Stores units. In recent years, however, other types have also been given numbers in this series.

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v t e British Rail Departmental Multiple Units
Diesel Multiple Units	Class 901 (From Class 101) · Class 930 · Class 950 (Similar to Class 150) · Class 951 (From Classes 201, 203, 205, 207) · Class 960 (From Class 101, 107, 114, 117, 121, 122, DL)
Electric Multiple Units	Class 910 (From Class 488) · Class 920 · Class 930 · Class 931 · Class 932 · Class 933 · Class 935 · Class 936 (From Classes 311, 501) · Class 937 (From Classes 302, 308) · Class 960 (From Classes 309, 310) ·
Others	APT-E · Multi-Purpose Vehicle · New Measurement Train · Parry People Movers 999 900
Diesel locomotives · Electric locomotives · Miscellaneous locomotives · Diesel multiple units · Electric multiple units · Departmental multiple units