Ben Stewart and Oliver Knowles are two of the four men behind Led By Donkeys - an anti-Brexit campaign group that has made its name by pasting politicians' quotes on billboards to highlight their hypocrisy.

Their new book 'Led By Donkeys: How Four Friends with a Ladder Took on Brexit' is being published, just as an early general election is called.

Krishnan talks to them about why they started the campaign, what impact they think it's had and whether they think direct action can change things.