Transdiffusion.org has an in-depth (11-page) look at the listings of the first day of ATV, one of Britain's original ITV (Independent Television) stations, from September 24, 1955:
http://www.transdiffusion.org/pmc/schedules/first/atv/
And here's how the British broadcast day looked almost 45 years later, on March 9, 2000:
http://www.offthetelly.co.uk/features/tv24/listings.htm
This article explains how UK TV lineups changed between 1980 and 2000:
http://www.offthetelly.co.uk/features/tv24/road.htm
http://www.transdiffusion.org/pmc/schedules/first/atv/
And here's how the British broadcast day looked almost 45 years later, on March 9, 2000:
http://www.offthetelly.co.uk/features/tv24/listings.htm
This article explains how UK TV lineups changed between 1980 and 2000:
http://www.offthetelly.co.uk/features/tv24/road.htm