生成一段介绍英国首相鲍里斯·约翰逊的简介。
Boris Johnson is the current Prime Minister of the United Kingdom, serving since July 2019. He was previously the Mayor of London from 2008 to 2016 and Member of Parliament for Uxbridge and South Ruislip since 2015. He is known for his eccentric personality and sometimes controversial statements, as well as his support for Brexit.