[Neil Jones]

BBC also has a 100% subtitle requirement for all its channels (BBC Parliament excepted, though a good chunk of it actually is subtitled). So the subtitles tag is pretty much redundant as far as the BBC is concerned. But if they want to keep doing it, well its been a traditional part of the ident for the last few decades or so so....

Pretty sure CBeebies doesn't plonk a subtitles tag at the start of its programming either, though can't be sure if this is promoted in other ways.