Anjem Choudhary, spokesman for pro-sharia campaigners Islam4UK was quoted in Daily Express as saying, "If the Queen decides to go outside then she must cover herself like every woman."
The radical Islamists had also demanded that the Mall approaching Buckingham Palace be renamed as Masjid road.
Seeking to introduce the Sharia law, Choudhary said that the a dome and tannoy to call followers to prayer will be fitted in Buckingham Palace once the Sharia law is implemented.
Choudhary also said that the Queen will be stripped of all power under the new Sharia law.
At the same time he said that the in the year 2009 he awaits the fall of Rome, the White House and of course the Buckingham Palace.