The sudden departure of Zia Yusuf, chairman of Nigel Farage’s anti-immigration party, is a blow to the organization and comes after a clash with another party member over the burqa.

Zia Yusuf resigned as chairman of Reform UK after 11 months in the job, delivering a blow to its leader, Nigel Farage, who has promised to build and professionalize the insurgent party in a quest for power at the next general election.

Zia Yousuf, the chairman of Britain's right-wing Reform UK party, resigned on Thursday. Reform, led by Brexit campaigner Nigel Farage, won five parliamentary seats in a breakthrough result at last July's national election,