1. He's now the subject of an official inquiry.

2. The remit of this official inquiry is to investigate the reasons for the accident.

3. The clean-up will continue for many months while the outcome of the official inquiry will be eagerly awaited.

4. In 1987, after she had been incarcerated for over three years, an official inquiry found that the evidence against her could not justify a conviction.

5. What started as cheap voyeurism escalated into an unstoppable cyberspace phenomenon, which forced the prime minister to establish an official inquiry that led to changes in police practice.