Muslims in London want to build Europe's largest mosque directly across the Thames from the Houses of Parliament and Westminster Abby. The land currently contains a power station.   It would attract some 200,000 Muslims daily,  mostly men, into a concentrated region around the British government. It would be able to broadcast across the center of London the  Allah Akbar call to prayer 5 times a day, over powering Parliament, as well as all other religious services  and  business. .