A radio station from the British Broadcasting Corporation in London
The World Service is transmitted in short wave and so can be picked up anywhere from darkest Peru to darkest Manhattan using only a short wave radio.
Invaluable when a chap is away in the colonies and he needs the shipping forecasts or the Test Match scores
NB. Originally the BBC broadcast three channels - The Home Service, The World Service and The Light Programme.
There's something comforting about that.