Four police officers in Britain’s top force are reportedly under close secret service surveillance after being identified as Al Qaeda spies, it emerged today. MI5 are said to have homed in on the the “sleeper” agents passing secrets from Scotland Yard to the terror group only in recent weeks. The suspected spies are believed to have used methods similar to those employed by the IRA in the 1970s as they infiltrated the police and the Army in Northern Ireland. All four are understood to be Asians living in London and are feared to have links both with Islamic extremists in Britain and worldwide terror groups – including Al Qaeda training camps in Pakistan and Afghanistan. MI5 chiefs reportedly believe the suspected moles have been planted as sleepers – agents under deep cover – to keep Al Qaeda informed of anti-terror raids planned by London’s Metropolitan Police. They are said to fear the four could have already accessed sensitive information about secret operations to root out terror cells planning further attacks in the UK.