As the BBC World Service increased its emphasis in news and current affairs programming, one of the casualties was its light entertainment and comedy programming; the best-known of this genre was Brain of Britain, the general knowledge quiz that originated on the domestic BBC Radio 4 service. While you can't hear Brain on the World Service, you can still listen live and on-demand via Radio 4's web stream.
Brain of Britain has been around in one form or another since 1953; it has aired since 1967 under this title. The host, Robert Robinson, has held that position for more than 30 years.
Brain airs live Mondays at 1330 UTC, with a repeat Saturdays 2300 UTC, if your primary means of listening to Radio 4 is via its live webcast; the most recent edition is available on-demand as well.
Brain of Britain will crown its champion on January 24th, 2009.
You can Google "brain of Britain" as a phrase to quickly reach the website, or go directly to www.bbc.co.uk/radio4/brainofbritain/ .