Incremental Radio (IBA)
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Incremental Radio was a new type of radio licence given out by the IBA (Independent Broadcasting Authority) in the United Kingdom between 1989 and 1990. In essence, these were additional radio services introduced into areas already served by an ILR (Independent Local Radio) station.
The new stations had to offer output not already available on ILR, such as specialist music or unique programmes for a specific section of the community, which meant radio stations covering a niche interest (e.g. Jazz music) could legally get on AM/FM. Pirates could apply as long as they closed by the end of 1988 and long established pirate stations, such as Kiss FM, complied in the hope of winning a licence.