Henry Bolton has been dismissed as leader of Ukip after party members backed a no confidence motion at an extraordinary general meeting.
More than 2,000 activists are expected to attend the emergency meeting to decide whether to endorse a motion of no confidence.
Ukip's ruling committee unanimously backed a vote of no confidence in Mr Bolton on Sunday and six key party figures have also resigned.
Pressure is growing on Henry Bolton to leave his position as Ukip leader and the resignation of six key party figures.
Henry Bolton has told ITV News he "can't guarantee" he will still be Ukip leader in a few days as he stood by Jo Marney in a racism storm.
Ukip leader Henry Bolton is resisting calls to resign after ending his relationship with his girlfriend over her "appalling" messages.
Henry Bolton has become Ukip's fourth leader in just over a year, replacing Paul Nuttall who resigned after the General Election.