His big break was as host of the overnight Clive Bull Through the Night Show which ran for several years in the early 1990s.
In 1994 he was hired by London News Talk 1152 (as LBC's AM service was briefly known) to host the weekend late-night slot.
Discussions tend to focus around two or three topics each evening based loosely upon what is in the news, or what interests or affects Bull.
However, he encourages callers to talk about whatever they like, on the basis that more interesting discussions come from things people genuinely care about.
[citation needed] In June 2011, Bull said he would be taking a break from talk radio, stating that: "After thirty wonderful years with LBC, I'm looking forward to being up all day and going to bed at a sensible hour".
He was described as "a brilliant phone-in host who knows that the way to make captivating talk radio is not to rant or rage, but to create a separate world, away from the nonsense of current affairs – then invite his listeners into it.