the lnwr electric lines built up to a substantial operation, at its peak in the 1930s-50s period, and then ran into a major decline. the two basic main services were euston to watford junction, and broad street to richmond, the latter passing over the former at willesden junction station. in addition there was a substantial operation of broad street to watford junction trains via primrose hill, which shared significant sections of both main routes. there were lesser branches from willesden junction to earls court (closed in ww2), watford to rickmansworth (closed in 1952) and watford to croxley green (closed in 1990). the earls court route was the normal operation for the four pioneer siemens-equipped trains.