Class 315: the 61 AC-only class 315s entered service in 1980 and were the last of the 1972-design stock to be delivered, and the only AC 4-cars. They replaced class 306 sets on the Liverpool Street - Shenfield route, and class 305/1s on West Anglia 'inners'. They have never strayed from these duties.
My only image of a class 315 in NSE livery, which replaced the original Blue and Grey, is this shot of 315857 leaving Bethnal Green for Liverpool Street with a train from Enfield Town.
Class 315NSEBETGEMLJohn Hurst, from