Original: The units were introduced fully on 29 September 1986 as part of the electrification of the Ayrshire Coast Line between and \/O/ Ardrossan with alternating current (AC) overhead lines.
Simplified: The units were introduced fully on 29 September 1986 as part of the electrification of the Ayrshire Coast Line between Glasgow Central and Ayr\/Ardrossan with alternating current (AC) overhead lines.