Several points to notice about ITV in 1967. First, although the vast majority of the population was covered and the network was complete, the majority of the land mass was not covered - below 50% in both Wales and Scotland.
The dual regions stand out: North, comprising of Lancashire, Cheshire and Yorkshire is covered by Granada on weekdays and ABC on weekends. ABC also appear on weekends in the Midlands (this region extends much further east today) with ATV on weekdays. In London, Rediffusion has weekdays while Saturdays and Sundays belong to ATV.