Partners no more. With BritBox UK set to be swallowed by the ITVX streaming platform this April, the BBC has reacted by putting down £255 million ($324 million) in cash to purchase ITV’s half of the SVoD platform’s international counterpart, which started as a joint venture between the two British broadcasters. Faultline has been shouting about this for the past two years, pleading the BBC to exit the failing BritBox UK while keeping its stake in the more successful international version, in turn transforming BBC iPlayer into a global streaming powerhouse, diversifying revenue streams in an attempt to preserve the institution. The clock is ticking for the BBC, growing acutely conscious of a three-year countdown for the expiration of TV…