the london and north western railway london inner-suburban network encompassed the lines from london broad street to richmond and london euston to watford and branch lines such as watford to croxley green. with links to the district railway at earl's court and over the route to richmond, and bakerloo line being extended over the watford dc lines, the railway was electrified at 630 v dc fourth rail. the electricity was generated at the lnwr's power station in stonebridge park and a depot built at croxley green.