Due to Brexit, the UK has been involved in a continuous political debate between Boris Johnson, the Prime Minister, and Jeremy Corbyn, the leader of the opposition. This paper compares and analyses the modality used in a corpus consisting of their political speeches until Brexit day. Modal verbs are used to express ability, possibility, willingness, certainty, obligation and necessity. Politicians’ choice of certain words can be a useful tool to affect voters’ decisions and modality is a resource which reinforces that influence. The findings show remarkable similarities between both politicians and reveal that possibility is the most frequent meaning of the modal verbs used in the corpus.