What a mean-spirited and ignorant post, anotheoldgit. Are you seriously begrudging the provision of news services to people in far-flung parts of the world in their own languages, for the sake of the 5p a week or whatever the individual contribution our licence fees make? And, while English is spoken in many different countries, that doesn't mean that every single citizen of those countries, who might listen to the World Service, speaks it.
Regarding advertising revenue, I question the confidence with which you say this wasn't affected when additional ITV channels started. ITV1 is currently struggling for revenue, and there are other factors that muddy the waters of your argument. Those additional ITV channels consist almost entirely of off-air time, ancient repeats and large blocks of time devoted to Quizmania-type rubbish, so they're hardly costly to run. And they give a idea of what to expect when commercially-based broadcasters have multiple channels.
If that doesn't bother you, fine, but it illustrates what I meant when I said that it's usually people who aren't bothered about quality who support abolition of the licence fee.