With Scotland Yard in the dock, now more than ever the public needs to know why the police cannot be trusted to investigate their own corruption.

Untouchables, a five year investigation which the Yard tried to stop, provides the essential context to the phone hacking and other scandals currently engulfing Britain's most powerful police force.

Republished after seven years, it was the first book to question the cosy relationship between the Yard and sections of the media, to explain why cops are incapable of investigating themselves and to expose the lack of independence in the new police watchdog.

From the 1983 Brinks Matt robbery, through the murders of Daniel Morgan, David Norris, Stephen Lawrence, Jill Dando and Damilola Taylor to the shooting of Jean Charles de Menezes, Untouchables reveals the cover ups, double standards and miscarriages of justice during the Yard's phoney war on corruption.

Sunday Times journalist Michael Gillard and TV producer Laurie Flynn expose how the discredited use of supergrasses in the war on corruption has re-emerged in the new wars on terror and crime, with the same disastrous effects: prosecution misconduct, collapsed trials, huge bills for the taxpayer, victims left without justice and the guilty walking free.