Daily Mail reported MI5 agents secretly infiltrated a bomb factory and found liquid explosives and detonators weeks before they foiled the plot to blow up America-bound passenger jets flying from British airports. The covert raids on homes of key terror suspects were also used to plant bugs and gather hours of crucial evidence against them. The carefully planned 'sneak and peek' operation involved members of the SAS and other surveillance specialists. It allowed the Security Service to eavesdrop on the suspected terrorists in the weeks before they were arrested.
They have been foolish to let so many radical Muslims in, but at least they don't have an ACLU or a Democratic Party working to protect the terrorists from their surveilence