Complex sentence: He was the presenter of the "Billboard" US Top 30 singles chart in the UK every Saturday afternoon until his last show on 8 February 1986.Thereafter,he moved to independent radio to host "American Countdown".
Split into simpler sentences: He was the presenter of the "Billboard" US Top 30 singles chart in the UK every Saturday afternoon until his last show on 8 February 1986. Thereafter, he moved to independent radio to host "American Countdown".