Senior Metropolitan police officers are supporting calls to change the law so that phone-tap evidence can be heard at inquests.
The calls have come after the shooting by police of Mark Duggan, an event which sparked rioting in Tottenham last summer.
Under the current law, the existence and content of any intercept evidence cannot be disclosed to a coroner or be heard in a public court. This is an exception, however, as almost all other types of surveillance evidence, including that obtained from bugging and surveillance cameras are permitted to be given to any court.
