As the political landscape of the UK has undergone radical change, its population have started to look at the BBC with a new pair of eyes. With allegations of bias flying from all political corners, we present the evidence for this bias, and look in particular at the technique used by BBC journalists when interviewing politicians, which we call 'Disbelief by Default'. In the never-ending battle between the politician and the journalist, we look at how the dynamic of the interview has changed over recent decades, and examine the serious consequences of pursuing this style of overly-abrasive journalism. Among our case studies will be the relationship between Laura Kuenssberg and Jeremy Corbyn, the BBC's approach to the Scottish independence referendum and the influence of Jeremy Paxman on BBC culture.