UKIP MEP Paul Nuttall announced his resignation on Friday, Sky News reported. Nuttall has become the latest member of the party to announce his departure in last several days.
His decision is reportedly connected with the disapproval of the appointment of the right-wing activist Tommy Robinson as an adviser to the party.
The party member's resignation has come days after former leader Nigel Farage declared he was leaving UKIP over discontent with the direction it was going and its handling of Brexit.
UKIP currently has no MPs in Westminster, but it had great influence in calling for a referendum on EU membership, and campaigned to leave, under former leader Nigel Farage.