Again, the licence fee is effectively a tax on every U.K. household that uses a television. That is imposed by legislation and collected by the BBC on behalf of the government. A commercial revenue is dealt with separately by BBC Worldwide, and yes, indeed, they do all the things you might expect. They run commercial channels, which are not BBC-branded in the U.K., but they also publish books, sell programs to other broadcasters, and publish DVDs and other merchandise, as you say.
