(Photograph) - Radio presenters at Chapel Fields Junior School in Olton, Birmingham, are fed up that a pirate station is broadcasting on their frequency. The pupils have raised Pounds 850 for a two-week licence and nearly Pounds 2,000 for transmitting equipment, but their transmitter is no match for the pirate’s. “Unless you are within a half-mile radius of the school, you can’t pick up anything other than the pirate tunes,” said head Peter Craythorn