These maps are not the most elegant design, rendering the country as an oblong. Lines around Ely are incorrectly drawn. Designed by Bernard Slatter at Central Advertising Services.
From a photo taken by Max Roberts of part of a poster seen at Coventry. Possibly advice on accessibility.
Shows new services via Kensington Olympia which was upgraded in 1986 for InterCity services. Also shows a service over the North London line. Messy detail in south London.