A British FBI has no chance against London's very own KGB | Simon Jenkins

Theresa May's desire to nationalise crimebusting will always founder on a far more powerful force: the Metropolitan police

Police protesting in London on Thursday should relax. They have won a great victory. The government is doing what governments always do in trouble. They flex their pectorals, kick sand in the opposition's face and invent "a British FBI". Tony Blair did it twice. Now David Cameron is doing likewise. It is a great headline but it never works.

Cameron clearly feels he must soo...