The locomotives of the Somerset and Dorset Joint Railway can be broken down into four eras:
The railway had a locomotive, carriage and wagon works at Highbridge, Somerset, but this closed in 1930. Note that the locomotive history of the Somerset and Dorset Joint Railway is complicated by the many reboilerings; rebuildings, and renumberering; not all of which is captured in the table.
References
Locomotives of the Somerset and Dorset Joint Railway Wikipedia(Text) CC BY-SA