Well on analogue tv here BBC, ITV and Channel 5 broadcast movies in 14:9 usually, Channel 4 seem to broadcast in lettrbox 16:9 and tvs can auto detect this and will correct the zoom on your tv (widescreen) to fit it to the screen.
Digital tv seems to be mostly 16:9 for movies and even news broadcasts and such. Sky movies can be set on the menu to play as pan&scan 4:3 or full widescreen or letterbox widescreen.
...and I actually just measured my tv and it is 1.77:1, I obviously just got them mixed up...and it annoys me how they are advertised as 28" but only have a 26" visible screen size.
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