| British Rail Class 501 | |
|---|---|
 A northbound Class 501 train calls at Harrow and Wealdstone. The B2 headcode signifies that this train worked the Broad Street-Watford via Primrose Hill (and vice versa) service. | |
| Specifications | |
| Car length | 57 ft (17 m) |
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The British Rail Class 501 electric multiple units were built in 1957/58 for use on the former LNWR/LMS suburban electric network of the London Midland Region. A total of 57 three-car units were built.
