British Island Airways (BIA) was the legal successor to British United Island Airways (BUIA). It commenced operations under that name in 1970. The airline’s main operating base was at London Gatwick. BIA’s scheduled route network was considerably enlarged in 1979 when it assumed the entire scheduled operation of British Air Ferries.
Ten years later it merged with Air Anglia, Air Wales and Air Westward to form Air UK, at the time the UK’s biggest regional airline. In 1982 British Island Airways was reconstituted by splitting off the charter operation Air UK had inherited from BIA at the time of its creation into a separate company. The reconstituted BIA ceased operations in 1991.
Source: Wikipedia

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