Between 1974 and 1983 the circuit had several different owners which helped to steadily develop the circuit's facilities and attractions. Derek Butcher became the owner in 1984 and since then Knockhill has been developed to a point where it is able to host rounds of most of the major British car and motorbike championships. The circuit hosted a round of the British Touring Car Championships for twelve years until the deal ended in 2002 with the promoters seeking infrastructure upgrades. Knockhill made improvements and the touring car series returned to Knockhill in 2004 with ITV televising the event live. The British Formula Three Championship and British GT Championship returned to Knockhill in May 2005.