Four admit London terror plot © Reuters/Suzanne Plunkett Four radical Islamists have pleaded guilty to plotting a bomb attack on the London Stock Exchange. They planned to send five mail bombs to various targets during the run up to Christmas 2010 and even discussed launching a "Mumbai-style" atrocity. Police found a list of targets at one of the defendant's homes that included London Mayor Boris Johnson, two rabbis, the American Embassy and the Stock Exchange. The four admitted preparing for acts of terrorism by planning to plant an improvised explosive device in the toilets of the London Stock Exchange. Five other men admitted lesser charges relating to terrorism. The nine defendants, all British nationals, were stopped by undercover anti-terror police before firm dates could be set for any attacks. They will be sentenced next week.