In the 1960s, these services were typically provided by Metro Cammell DMUs, but the electrification of the WCML between Weaver Junction and Glasgow Central in the 1970s allowed for their replacement with Pressed Steel Class 303 EMUs in May 1974. An hourly electric train service was then provided between Lanark and Glasgow Central (High Level) on the route via Bellshill until the opening of the Argyle Line between Rutherglen and Partick and the introduction of the brand new BREL Class 314 EMUs in November 1979. This afforded the opportunity to route services through central Glasgow to destinations north of the River Clyde, and thus initially an hourly service operated from Lanark to Milngavie from Monday to Saturday which ran limited stop between Motherwell and Glasgow. However, the intermediate calls via Bellshill were soon reinstated, and with the exception of the introduction of several additional weekday peak expresses, this pattern persisted with few alterations until the introduction of a seven-day service in 1997.