As coronavirus struck, other topics fell away

Mentions of topic keywords per 1,000 words, BBC Question Time programmes broadcast between 9 January and 14 May 2020 (four-week rolling average)

Keywords in each topic are: Brexit (Brexit, Brexiteer, EU, European, Europhile, withdrawal); Corbyn (Corbyn, Corbynism, Jeremy); Coronavirus (corona, coronavirus, Covid, Covid-19, disease, infection, pandemic, virus); Drugs (drug). Plurals also included.

Source: Box of Broadcasts (BoB) transcripts, Learning on Screen Get the data