The Cleator and Workington Junction Railway (C&WJR) was located in West Cumberland in Northern England, serving the towns of Cleator Moor and Workington and intermediate villages. It was mainly used for coal, limestone and iron ore traffic for the local industries.

Siddick Junction railway station was opened by the Cleator and Workington Junction (C&WJR) and London and North Western Railways in 1880 to provide exchange platforms for passengers wishing to change trains from one company's line to the other. A passenger travelling from Maryport to Distington, for example, would change at Siddick Junction. As a purely exchange station - like Dovey Junction and Dukeries Junction elsewhere in the country - the owning companies would not need to provide road or footpath access or ticketing facilities as no passengers were invited to enter or leave the station except by train.