A placard reading 'Vote Today' is seen in London, Britain on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead. (Photos: Xinhua)

People walk past a polling station in London, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.

A woman arrives at a polling station to vote in the European Parliament elections in Biggin Hill, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.

A polling station sign is seen in London, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.

TV crews are seen at Downing Street in London, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.

A woman walks past a polling station in London, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.

A woman leaves a polling station in South Ruislip, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.

A woman stops by a polling station in London, Britain, on May 23, 2019. Voters across Britain cast their ballots on Thursday for the European Parliament elections as it is widely forecast that Brexit Party will take a lead.