David Coverdale recording "Slide It In" to re-form Deep Purple. (Ian Paice had left Whitesnake in 1982.) In 1985, Sykes and Coverdale started working on new songs for the next album, but Coverdale soon contracted a serious sinus infection that made recording close to impossible for much of 1986 and which had doctors thinking he might never sing again. Coverdale eventually recovered, and recordings were continued. But before their upcoming album was fully recorded and released, Coverdale had dismissed Sykes from the band. The split with Sykes was, reportedly, not amicable. In many period interviews, Coverdale stated that the next album was
David Coverdale questionable bangs or hair and it's all becoming a bit... boring. In 1990 Coverdale sang and co-wrote (with Hans Zimmer and Billy Idol) the song "The Last Note of Freedom" for the Tony Scott film "Days of Thunder". On 26 September 1990, after the last show on the "Slip of the Tongue" tour in Tokyo, Coverdale disbanded Whitesnake indefinitely. Tired of the business in general, the rigors of touring and troubled by his separation and later divorce from Tawny Kitaen, Coverdale wanted to find other values in life and took "private time to reflect" and re-assess his career direction. In